Gah... I really, *really* wish I would stop seeing people translate "I don't like short games" into "short games are bad." There is more to a game than its length. Some games have a point to make, they make it really, really well in an hour, and to make it longer would just be padding it for no reason. And plenty of people enjoy these short games without complaining that they didn't take enough hours to finish. People who don't like short games should go ahead and not buy short games, but PLEASE stop suggesting that they are inherently inferior or should disappear altogether.
In any case, I do believe that people like me who enjoy and seek out short, clever games (as long as they are cheap) are definitely less likely to be the ones abusing the refund system. If people were buying games not realizing they were short, then getting angry because they couldn't get their money back, then I guess they should go ahead and get their money back. That doesn't mean game devs should never make short games or that they deserve to go out of business or something. I guess it just means that now they will get their money from the people genuinely interested in the short games (and willing to spend a dollar or two on them) rather than getting that extra padding from people who demand X hours of play for the game to be worth buying, which I guess is fair.
If you really believe that a short game isn't worth buying, give Ephemerid a shot. Beatable in about 45 minutes, worth every second, and exactly as long as it should be. If you don't like it, you can just get your money back now I guess. And then there are games like To The Moon, which takes about 3 hours to beat and is widely regarded as a masterpiece. As long as the game isn't falsely advertised as taking a lot of time to beat, I truly cannot comprehend why anyone has a problem with them being available.