Everyone has an opinion on Kickstarter and its use in the rpg "world". You can't go a day and not see some blogger somewhere commenting on Kickstarters, how they suck, how they don't suck, what would make them better, etc.
I don't have many strong feelings about the subject, because my rpg budget is based (almost) solely on the earnings of The Fantasy Cartographic. Since it has been an extremely slow year, I haven't spent much money on gaming material--kickstarter or otherwise. I did contribute to the Dwimmermount kickstarter and, while it is behind schedule, I'm okay because Autarch has done a better job of keeping the backers informed of its status.
Overall, my opinion is that, contrary to most of the conventional wisdom in the OSR, it is NOT a pre-order system. I know that many will consider this blasphemous, but there you go. (It is probably even more dangerous for me to voice this opinion, considering the fact that I might be pursuing a kickstarter of my own. These words may be used against me at some future point--oh well.) If you are using kickstarter as a pre-order system, that is a mindset that you chose of your own accord. I don't think it fair it get pissed off if that turns out not to be the case, regardless of whatever promotional material a given project is using to sell their wares.
I think Joethelawyer has some good things to say. I agree with him.