Why the hell would they care who is buying it? They're getting paid either way.

The only reason they'd care is because they want to sell your personal information.

That is an incredibly long bow to draw from someone that obviously doesn’t know what they’re talking about and is willing to make massive jumps to conclusions. Do you know how ecommerce works? I agree that it is a bit absurd, but not nearly as absurd as your claim of “the only reason”.