That's not a demo, that's a return policy. Plus, in most cases you don't get a good feel of a game in the first 2 hours of the game. A demo is a snippet of the game made specifically to let people get accustomed to most of the mechanics in a game, something that isn't usually present in the first two hours.

You could've easily said Steam Next Fest and I would've agreed with you. Indie devs are the only ones who seem to care about their players these days.