This piece by Michael Wolf, writing for GigaOm, should be of interest to those considering crowd funding their films with Kickstarter or IndieGogo. I was unaware of the "thirty percent rule," apparently observed by others before but restated and confirmed by Wolf:
Once projects get over the hurdle of 20 percent funding and reach 30 percent or more of their funding target, the chance of reaching the funding goal grows exponentially.
Also of interest is the fact that film and video projects are by far the largest category of funded projects, with music and design projects following up. Read the entire article on GigaOm.