tomimt: It helped Ogre a lot, that the tier where you actually got the game was 100 dollars. It has notably less backers than SpaceVenture.
orcishgamer: Well, if you're selling a "huge box of stuff" you can't hand it out for 15 USD. OGRE is also kind of a bad example in retrospect, given the way SJG did his swag stuff, you donated extra to essentially buy extra tshirts and stuff, a lot of people came back last minute and some nearly doubled their pledges (but, really, how COULD I turn down a polo shirt with an OGRE embroidered on it???).
As someone who has been studying Kickstarter projects for several months now, I found OGRE to be a completely crazy project, but one that was fascinating to watch.