The answer has to do with something deeply ingrained in our biology. Kickstarter is successful because its creators tell great stories. And stories are how we humans form relationships.
We are physically programmed for stories. Stories are what bind us to our national identities, our families, our friends. We share stories all day long; every time we sit down to dinner with friends and acquaintances, we retell the dramas and tragedies and comedies of the day. And that brings us closer to each other, causes us to trust each other, even.
From the article The Secret To Kickstarter’s Success Isn’t What You Think