Most Dev's don't actually start making a decent amount of money until they have a good amount of content in their games (IE they get to around the halfway point). Those Dev's end up falling into two categories; they either go on and finish their game, then moving on to a new game; or they get lazy and milk their supporters.
Rarely does a game blow up and get the Dev rolling in money early on in development before they really have a good amount of content, but that's usually because there's something that caught the attention of people on here, like high quality art, renders and animation. And sadly a good portion of those games end up just fizzling long before the Dev's get to the halfway point.
