Doesn't bother me too much, mostly because I don't have a recent iProduct (I have an iPod Classic and a previous generation iPod Nano - that long one that still has a click wheel), so I'm generally unaware of what games are exclusive.
The only time I'll find it is from a blog that mentions it (usually Kotaku or Gizmodo). The only one that comes to mind is there was a Voltron game for iOS that looked fun. But there's also Android exclusive games (and even a thread for it in here somewhere). So its not like its completely one-sided.
As far as supporting the developers, all I can say is I try to do my part and pay for apps I think are well worth the 99cents, which is less than most would spend on a bag of chips in a vending machine or a cup of coffee so I don't understand why its suddenly too much for a game you could end up spending hours playing.
I will say that Google Play Store changing the refund policy from 24 hours to 15 minutes doesn't help things. Some apps are in the $2-5 (or even higher) range, so if it doesn't seem good in 10 minutes of play, chances are it will get returned for a refund.
Maybe the new Google Play gift cards will help, I think some people just don't want to enter a credit card number (like my parents for example, but I bought my mom a gift card and she used it for some pay apps).