Document:

EX-10.8

 Exhibit 10.8 

Endeavor Acquisition Corp. 

477 Madison Avenue, 6th Floor 

New York, New York 10022 

                    , 2022 

First In Line Enterprises, Inc. 
 533 Airport Blvd, Suite 400

 Burlingame, CA 94010 
 Re: Administrative Support
Agreement 
 Ladies and Gentlemen: 
 This
letter agreement by and between Endeavor Acquisition Corp. (the “Company”) and First In Line Enterprises, Inc. (“First In Line”), dated as of the date hereof, will confirm our agreement that, commencing on the date the securities
of the Company are first listed on The Nasdaq Global Market (the “Listing Date”), pursuant to a Registration Statement on Form S-1 and prospectus filed with the U.S. Securities and Exchange
Commission (the “Registration Statement”) and continuing until the earlier of the completion by the Company of an initial business combination or the Company’s liquidation (in each case as described in the Registration Statement)
(such earlier date hereinafter referred to as the “Termination Date”): 
 First In Line shall make available to the Company, at
477 Madison Avenue, 6th Floor, New York, NY 10022 (or any successor location of First In Line), office space, administrative and shared personnel support services as may be reasonably
requested by the Company. In exchange therefor, the Company shall pay First In Line the sum of $20,000 per month on the Listing Date and continuing monthly thereafter until the Termination Date; and 

First In Line hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind (each, a
“Claim”) in or to, and any and all right to seek payment of any amounts due to it out of, the trust account established for the benefit of the public shareholders of the Company and into which substantially all of the proceeds of the
Company’s initial public offering will be deposited (the “Trust Account”), and hereby irrevocably waives any Claim it may have in the future as a result of, or arising out of, this letter agreement, which Claim would reduce, encumber
or otherwise adversely affect the Trust Account or any monies or other assets in the Trust Account, and further agrees not to seek recourse, reimbursement, payment or satisfaction of any Claim against the Trust Account or any monies or other assets
in the Trust Account for any reason whatsoever. 
 This letter agreement constitutes the entire agreement and understanding of the parties
hereto in respect of its subject matter and supersedes all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions
contemplated hereby. 
 This letter agreement may not be amended, modified or waived as to any particular provision, except by a written
instrument executed by the parties hereto. 
 No party hereto may assign either this letter agreement or any of its rights, interests, or
obligations hereunder without the prior written approval of the other party. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title to the purported
assignee. 

  
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 This letter agreement, the entire relationship of the parties hereto, and any litigation
between the parties (whether grounded in contract, tort, statute, law or equity) shall be governed by, construed in accordance with, and interpreted pursuant to the laws of the State of New York, without giving effect to its choice of law
principles. 
 [Signature Page Follows] 

  
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	Very truly yours,
	
	ENDEAVOR ACQUISITION CORP.
		
	By:	 	 
		 	Name: Stephen CuUnjieng
		 	Title: Chief Executive Officer and Chief           Financial Officer

  

			
	AGREED TO AND ACCEPTED BY:
	
	FIRST IN LINE ENTERPRISES, INC.
		
	By:	 	 
		 	Name: Steven Fletcher
		 	Title: Financial Officer

  
 [Signature Page to Administrative
Support Agreement]EX-10.9

 Exhibit 10.9 

THIS PROMISSORY NOTE (“NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS
NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO
THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED. 
 PROMISSORY NOTE 

Principal Amount: Up to $5,175,000 
 Dated as of
[    ], 2022 
 New York, New York 

Endeavor Acquisition Corp., a Cayman Islands exempted company (“Maker”), promises to pay to the order of Endeavor Sponsor
LLC, a Cayman Islands limited liability company, or its registered assigns or successors in interest or order (“Payee”), the principal sum of up to Five Million One Hundred and Seventy-Five Thousand Dollars ($5,175,000.00) in lawful
money of the United States of America, on the terms and conditions described below. All payments on this Note (unless the full principal is converted pursuant to Section 15 below) shall be made by check or wire transfer of immediately available
funds to such account as Payee may from time to time designate by written notice in accordance with the provisions of this Note. 
  

	 	1.	 Repayment. The principal balance of this Note shall be payable by Maker on the earlier of (such date,
the “Maturity Date”), (a) the date on which Maker consummates its initial business combination and (b) the date of the liquidation of Maker. The principal balance may be prepaid at any time, at the election of Maker. Under no
circumstances shall any individual, including but not limited to any officer, director, employee or shareholder of the Maker, be obligated personally for any obligations or liabilities of the Maker hereunder. 

 

	 	2.	 Interest. This Note shall be non-interest bearing.

  

	 	3.	 Drawdown Requests. Maker and Payee agree that Maker may request Four Million Five Hundred Thousand
Dollars ($4,500,000.00) to fund the trust account established in connection with the Maker’s initial public offering (the “Trust Account”) to a value of $10.20 per public share sold in such initial public offering (the “Trust
Account Funding Level”), on the date of the consummation of such offering, solely for deposit into the Trust Account. The remaining undrawn principal of this Note may be drawn down on the date of the consummation of the underwriter’s
over-allotment option in connection with the IPO, solely for deposit into the Trust Account to ensure that the Trust Account Funding Level is maintained at $10.20 per share sold in the Maker’s initial public offering, in an amount proportionate
to the exercise of such over-allotment option. Once an amount is drawn down under this Note, it shall not be available for future drawdown. No fees, payments or other amounts shall be due to Payee in connection with, or as a result of, any payments
under this Note. 

	 	4.	 Application of Payments. All payments received by Payee pursuant to this Note shall be applied first to
the payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable attorney’s fees, and then to the reduction of the unpaid principal balance of this Note.

  

	 	5.	 Events of Default. The following shall constitute an event of default (“Event of
Default”): 

 (a) Failure to Make Required Payments. Failure by Maker to pay the principal amount due
pursuant to this Note within five (5) business days of the Maturity Date. 
 (b) Voluntary Bankruptcy, Etc. The commencement by
Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,
sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the
taking of corporate action by Maker in furtherance of any of the foregoing. 
 (c) Involuntary Bankruptcy, Etc. The entry of a decree
or order for relief by a court having jurisdiction in the premises in respect of Maker in an involuntary case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation of its affairs, and the continuance of any such decree or order unstayed and
in effect for a period of 60 consecutive days. 
 For clarity, the Maker’s failure to complete an initial business combination within
18 months from the closing of its initial public offering or during any shareholder approved extension period shall not constitute an Event of Default hereunder. 
  

	 	6.	 Remedies. 

(a) Upon the occurrence of an Event of Default specified in Section 5(a) hereof, Payee may, by written notice to Maker, declare this Note
to be due immediately and payable, whereupon the unpaid principal amount of this Note, and all other amounts payable hereunder, shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which
are hereby expressly waived, anything contained herein or in the documents evidencing the same to the contrary notwithstanding. 
 (b) Upon
the occurrence of an Event of Default specified in Sections 5(b) or 5(c) hereof, the unpaid principal balance of this Note, and all other amounts payable hereunder, shall automatically and immediately become due and payable, in all cases without any
action on the part of Payee. 
  

	 	7.	 Waivers. Maker and all endorsers and guarantors of, and sureties for, this Note waive presentment for
payment, demand, notice of dishonor, protest, and notice of protest with regard to this Note, all errors, defects and imperfections in any proceedings instituted by Payee under the terms of this Note, and all benefits that might accrue to Maker by
virtue of any present or future laws exempting any property, real or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or providing for any stay of execution, exemption
from civil process, or extension of time for payment; and Maker agrees that any real or personal property that may be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued hereon, may be sold upon any such
writ in whole or in part in any order desired by Payee. 

  
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	 	8.	 Unconditional Liability. Maker hereby waives all notices in connection with the delivery, acceptance,
performance, default, or enforcement of the payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party, and shall not be affected in any manner by any indulgence, extension of time,
renewal, waiver or modification granted or consented to by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the payment or other provisions of this Note, and
agrees that additional makers, endorsers, guarantors, or sureties may become parties hereto without notice to Maker or affecting Maker’s liability hereunder. 

 

	 	9.	 Notices. All notices, statements or other documents which are required or contemplated by this Note
shall be: (i) in writing and delivered personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in writing, (ii) by facsimile to the number
most recently provided to such party or such other address or fax number as may be designated in writing by such party and (iii) by electronic mail, to the electronic mail address most recently provided to such party or such other electronic
mail address as may be designated in writing by such party. Any notice or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt of written
confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent by mail. 

 

	 	10.	 Construction. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF NEW YORK, WITHOUT
REGARD TO THE CONFLICT OF LAWS PROVISIONS THEREOF. 

  

	 	11.	 Severability. Any provision contained in this Note which is prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall not
invalidate or render unenforceable such provision in any other jurisdiction. 

  

	 	12.	 Trust Waiver. Notwithstanding anything herein to the contrary, Payee hereby waives any and all right,
title, interest or claim of any kind (“Claim”) in or to any distribution of or from the trust account (the “Trust Account”) established in connection with Maker’s initial public offering, and hereby agrees not
to seek recourse, reimbursement, payment or satisfaction for any Claim against the Trust Account for any reason whatsoever; provided, however, that upon the consummation of the initial business combination, Maker shall repay the principal balance of
this Note out of the proceeds released to Maker from the Trust Account. In furtherance of the foregoing, the Payee hereby agrees that the Maker’s indebtedness and obligations hereunder (including, without limitation, principal, fees, charges,
expenses, costs, professional fees and expenses, and reimbursement obligations) plus any distributions or other payments whether presently existing or arising in the future are hereby subordinated to any security interest or similar claim created in
the Trust Account by, or on behalf of, any shareholder of the Maker. 

  
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	 	13.	 Amendment; Waiver. Any amendment hereto or waiver of any provision hereof may be made with, and only
with, the written consent of Maker and Payee. 

  

	 	14.	 Assignment. No assignment or transfer of this Note or any rights or obligations hereunder may be made by
any party hereto (by operation of law or otherwise) without the prior written consent of the other party hereto and any attempted assignment without the required consent shall be void; provided, however, that the foregoing shall not apply to
an affiliate of Payee who agrees to be bound to the terms of this Note. 

  

	 	15.	 Conversion. 

(a) Notwithstanding anything contained in this Note to the contrary, at Payee’s option, at any time prior to payment in full of the
principal balance of this Note, Payee may elect to convert all or any portion of the unpaid principal balance of this Note into that number of units, each unit consisting of one ordinary share of the Maker and
one-half of a warrant, each warrant exercisable for one ordinary share of the Maker (the “Conversion Units”), equal to: (x) the portion of the principal amount of this Note being
converted pursuant to this Section 15, divided by (y) $10.00, rounded up to the nearest whole number of units. The Conversion Units shall be identical to the “placement units” (as such term is defined in the Maker’s Registration
Statement on Form S-1, which was originally field with the SEC on [ ], 2021), issued by the Maker to the Payee in a private placement upon consummation of the Maker’s initial public offering. The
Conversion Units and their underlying securities, and any other equity security of Maker issued or issuable with respect to the foregoing by way of a share dividend or share split or in connection with a combination of shares, recapitalization,
amalgamation, consolidation or reorganization, shall be entitled to the registration rights set forth in Section 16 hereof. 
 (b) Upon
any complete or partial conversion of the principal amount of this Note, (i) such principal amount shall be so converted and such converted portion of this Note shall become fully paid and satisfied, (ii) Payee shall surrender and deliver
this Note, duly endorsed, to Maker or such other address which Maker shall designate against delivery of the Conversion Units, (iii) Maker shall promptly deliver a new duly executed Note to Payee in the principal amount that remains
outstanding, if any, after any such conversion and (iv) in exchange for all or any portion of the surrendered Note, Maker shall, at the direction of Payee, deliver to Payee (or its members or their respective affiliates) (Payee or such other
persons, the “Holders”) the Conversion Units, which shall bear such legends as are required, in the opinion of counsel to Maker or by any other agreement between Maker and Payee and applicable state and federal securities laws. 

(c) The Holders shall pay any and all issue and other taxes that may be payable with respect to any issue or delivery of the Conversion Units
upon conversion of this Note pursuant hereto; provided, however, that the Holders shall not be obligated to pay any transfer taxes resulting from any transfer requested by the Holders in connection with any such conversion. 

(d) The Conversion Units shall not be issued upon conversion of this Note unless such issuance and such conversion comply with all applicable
provisions of law. 
  

	 	16.	 Registration Rights. 

(a) Reference is made to that certain Registration Rights Agreement between Maker and the parties thereto, (the “Registration Rights
Agreement”). All capitalized terms used in this Section 16 shall have the same meanings ascribed to them in the Registration Rights Agreement. 

(b) The Holders shall be entitled to one Demand Registration, which shall be subject to the same provisions as set forth in the Registration
Rights Agreement. 

  
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 (c) The Holders shall also be entitled to include the Conversion Units and their underlying
securities in Piggyback Registrations, which shall be subject to the same provisions as set forth in the Registration Rights Agreement; provided, however, that in the event that an underwriter advises Maker that the Maximum Number of Securities has
been exceeded with respect to a Piggyback Registration, the Holders shall not have any priority for inclusion in such Piggyback Registration. 

(d) Except as set forth above, the Holders and Maker, as applicable, shall have all of the same rights, duties and obligations set forth in
the Registration Rights Agreement. 
  

	 	17.	 United States Tax Matters. 

The parties hereto hereby acknowledge and agree that, notwithstanding that the Note is titled as “Promissory Note,” for United
States federal and state income tax purposes the Note is, and at all times has been, more properly characterized as equity. Accordingly, except as otherwise required by a Taxing authority following a good faith resolution of an audit, the parties
agree to treat the Note as equity for all United States federal and state income tax purposes, and further, for the avoidance of doubt, the Maker hereby agrees that, with regard specifically to the rule set forth in Section 385 of the Internal
Revenue Code of 1986, as amended (the “Code”), the Maker will treat the Note as equity as of the time of issuance. The parties shall prepare all required United States federal and applicable state tax returns and reports consistent with
the treatment described in this Section 17. 
 [Signature Page Follows] 

  
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 IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused this Note
to be duly executed by the undersigned as of the day and year first above written. 
  

			
	Endeavor Acquisition Corp.
		
	By:	 	 
		 	Name: Stephen CuUnjieng
		 	Title: Chief Executive Officer and Chief Financial Officer

 [Signature Page to Promissory Note]

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