Pheace: ...Only allowing payment options from the region in question, only allowing the same payment option to be used on x accounts, restricting purchases (even gifts) to X per account total, allowing gifts in those regions but not allow them to be activated if you're not in that region. Stuff like that is more likely I imagine, though none of them are optimal.
I could create a new account, use it only with a proxy IP and buy games using a paypal account. If then the game does not phone home after buying then how would they find out where the buyer is actually located?
On the other hand, if the games phone home and if GOG then restricts access to any part of the services or to the game, would that not be kind of DRM?
Matruchus: The problem is that the definition of base price is now totally moot and us price could be at most now used as a reference price.
We could use the cheapest price as the base price and see all other prices as premiums on the cheapest available price?