[Moto X General] eldamobo:
The updated details for the promo are posted. They're going with a coupon code issuing system which lasts a week - should be easier on their systems.

No Dev Editions allows tho.

From https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/97459/action/auth

2-Day Holiday Sale FAQs

How does the 2-Day Holiday Sale work?

We want to make the sale as easy, and stress-free as possible, so you have a week to customize your Moto X. Simply enter your name and email address when the registration opens and we’ll email you a unique, one-time promotion code that you can apply to your order. Quantities of the personalized Moto X are limited and registration will stay open while quantities last.

You will also be able to get 30% off select accessories through Monday, 12/9 by entering promo code THANKS.

Why do I have to register?

Registering saves you a spot so you don’t have to rush to get your order in. Once you’ve successfully registered, we’ll email you a unique promotion code that will allow you to design a phone at your leisure. You will have one week to design and order your custom Moto X before your promo code expires.

How long is registration open?

Registration is open while quantities last or by midnight EST of the promotion day, whichever comes first.

If I successfully register, how will I receive the promotion code?

You will receive an email including a one-time promotion code within a few hours of registering (your code only works once and for one phone).

Does my promo code expire?

Yes. Promotion codes expire one week from issuance (at midnight EST of that day). The expiration date will be provided in the email we send with the code.

How do I apply the promotion code to get the discount?

After you submit your credit card information, you’ll see a Review Order page. Here, you’ll enter your one-time promo code in the Enter Promo Code box and click GO to apply.

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Note: You can apply both the $150 discount promo code and the 30% off most accessory code to the order by repeating the steps above.

Can I buy multiple Moto X phones with this promotion?

Technically, yes. But, each email address can be registered only once and a promotion code will only be valid on one device.

How do I get the 30% off select accessories discount?

At the review order screen during checkout, enter THANKS in the Enter Promo Code box and click GO to apply the discount to your order.

Are any accessories excluded from the 30% off sale?

Yes. This promotion is not valid on Chromecast, Roadster Pro, Moto G Case and Shells, JBL Micro Wireless, Micro USB Power Cable, DECK and TRACKS AIR by SOL REPUBLIC x Motorola products.

Can I use my promo code on a 32GB Moto Maker Moto X device?

Certainly! Apply your one-time promo code and bam, you’ll get $150 off.

Can I use my promo code on a Moto X Developer Edition or a Moto G?

No, the promotion is only valid on Moto X phones created with Moto Maker.

How long will it take to receive my Moto X once I’ve ordered?

Moto Maker will provide an estimated delivery date while you design your product and again at checkout. You will also receive an email when we start assembling your device as well as when it ships. *Shipping delays may occur based on your location. Please check shipping provider tracking number for actual delivery dates.

If I have issues or questions while registering or placing an order, who can I contact?

Chat with us and we’ll help you out.

If I already designed my device previously, and it is still in my shopping cart, do I have to design the phone again?

Nope. During the order review screen at checkout, you can just apply the promo code to get the discount. (See our FAQ above about applying promo codes if needed.)