If you decide that Vendor Central isn’t for you, or you simply don’t like Amazon’s terms, then you shouldn’t be afraid to say no. It shouldn’t have any effect on your Seller Central account.
There is one important exception, if all of the following apply:
You are a manufacturer
You sell through Amazon marketplace (Seller Central)
You sell to other retailers or distributors
Amazon’s selling policies include a Product Availability Policy that applies in this situation. This says that you should offer Amazon the option to buy your products at wholesale prices so they can sell them themselves. If you don’t comply, Amazon could suspend your selling account.
This doesn’t affect you as a private label seller or small brand, if you don’t have any retailers or distributors. As a selling policy it also does not apply if you don’t use Seller Central yourself. Finally, it doesn’t apply if you are a retailer or distributor rather than a manufacturer.