Kickstarter is a great idea and excellent games came out from it, but it seems that the great games are the exception, and the cancelled projects / scams are the norm.
Not the case at all. Long awaited or wanted titles getting the chance to exist hypes people up, people back the game, enough money is pooled to fund development. That is usually the peak of hype when it comes to kickstarter games. Originally hyped game gets released, is good, okay, great, terrible, whatever, but besides the original exposure the game itself gets lost in the sea of other releases.
Kickstarter games have the same chance or probability of relative quality compared to every other game. That reality being realized probably made some of original magic fade away.