First time I heard about GOG. Is like Steam but you download the .exe installer (or wahtever format it is) from the game you purchase? Like Kazaa/Ares but paid? I love it to be honest, and I think that's how it should be, but how do creators (and GOG) fight piracy? What's preventing me from buying, getting the offline installer and then sharing it later?

If I am wrong and GOG is something completely different, then let's build something like this together! (a marketplace of offline installers!)

> What's preventing me from buying, getting the offline installer and then sharing it later?

Nothing. People already do that. GOG does not fight against this, to my knowledge they believe that people will willingly pay for good games. It worked with Witcher 3 10 years ago as an example.