[guycook]

There's already an attempt at doing this on PC [0] led by Brian Fargo of Interplay / inXile fame. I can't speak to how effective it is or how many people use it but it seems to be still operative after a year on public beta.

One key issue I see is that it's still quite centralised - you have to resell through their store and can't just exchange a game license for crypto at an arbitrary price. No surprise though that this is a necessary step on the way to getting publishers on board.

[0] https://store.robotcache.com/