I've heard of non-delivered projects. So far, I don't know of any big money high profile ones, but I'm sure there will be one sooner or later.

Like the other guy said, you're not investing, you're buying. Or maybe donating.

I don't think there's any recourse for a failed project, and I don't think there should be one. If you're thinking about contributing to a Kickstarter project, understand that there are no guarantees and moderate your contribution accordingly.