I think the problem is that even most "Holy shit, we broke all our expectations!" Kickstarters are...modestly successful grants, in terms of scientific funding. And most crowd funding for science is, for lack of a better word, not worth the effort. The campaigns that are existing dwell mainly in the realm of "can fund a grad student's field work", and carry a significant burden in teaching/educating university admin in terms of where this money comes from, trying to not get them to take overhead from it, etc.