Every other platform is simply worse. The only one who even tries to be better is GOG, of which they do a good job for DRM free, which gets sales from me.

My question to you is: why would anybody buy something other than on those two platforms? There is not a single advantage to Epic's or Amazon's game store I can think of. They don't have good Linux support, they don't have a good review system, they don't have forums, they don't have mod delivery systems, they don't have any better sales, they don't have family sharing, they don't have in-home streaming.

Edit: And don't get me started on the Microsoft store....