I've actually paid for a game. Had a good demo/trial and I paid for the full version. However, part of the problem is that way too many mobile games are trash. I'm not putting any money in unless I can try the game first.

PC has a similar problem. It's easy to find good games, but they're are still so many to choose from and finding one that fits what I like is still hard without a trial/demo of some sort. The 2 hour limit on Steam isn't enough time for a lot of games. Hell, I was just trying out a demo for a game right up my alley and I spent two hours just looking at all the options I had before I really even started the game. I think there's too much customization for my taste. It's cool, but that also means you can spend countless time trying to customize things to be optimal. I'll spend all my time tweaking things rather than playing.