Look at it this way: You can kick in $15 to 4 Kickstarter campaigns, and even if all but one fails you are still getting one game for $60, which is no different than buying a game at release anyway.
Best case scenario, you get 4 games for $15 apiece. Worst case, somehow all of them fail and you get nothing. I think the worst case is incredibly unlikely, though.
What? If the kickstarter doesn't achieve the required fund you won't get charged anything. So you won't be paying 60 dollars for one game.