Far West is the poster child, but really...
Kickstarter is a -terrible- thing for people who want to buy RPGs, and act as a patron for them on the side.
Typically speaking, any rewards are non-exclusive, any prices are beat by online discounters (or you can pirate if you're a PDF-only fan), and what you do finally get... probably wasn't worth the wait (and non-backers don't really have to wait, as RPGs usually hit retail/DriveThru at the same time as backers get their stuff).
There's exceptions, but these are from big companies that can afford exclusives (Onyx Path and their high quality hardbacks) or discounts (Monte Cook Games -used- to be competitive with the online retailers). And people who want to pay for a PDF copy of a book they already own (which is a whole other thing, and regionally dependent) can be better off backing on KS. But generally speaking, the risk-to-reward ratio for Kickstarter RPGs are terrible. And the smaller the publisher, the less likely you'll ever see anything it seems.
So if you want to be a patron and -maybe- get something for your money, sure, back a RPG on Kickstarter. But if you're looking for a deal, just save your money and wait (which is like backing the KS, but with no risk).