So you mean a 1990s pokemon red game and some pokemon red game from 2000 something with updated graphics?
Wow you sure made a compelling argument for game piracy.
I'm not advocating piracy, I'm pointing out that people do purchase games they have played before, even if they played it for free, which you asserted was an unrealistic scenario.
Also, people rebuy games that are re-released but not even remastered. For example, I have purchased Dead Island and Borderlands 2 multiple times when they've been re-released on a new platform.