I haven’t contributed to any game/art Kickstarters, because really, if you’re going to donate to some anonymous cause there are infinitely more important ones. I did see some nifty real engineering projects recently though, like protein bars made out of crickets (delicious)

The best artistic use case seems to be people who were previously doing something for free moving to fulltime by invoking their existing fandom; a couple of webcomic artists I like have used it in this way.