What's the harm in it? These are, usually, small time developers with very little money. All they're asking is that with a little faith and some history of their previous work, maybe you'd want to help support a game they're making. Seems harmless to me.
It's not usually a choice, BTW. It takes tens of millions of dollars to make the average AAA title. People have to start somewhere. I find indie developers try way harder to make a good product, instead of just relying the developer's name to push sales.