From Wikipedia: Reward-based crowdfunding has been used for a wide range of purposes, including motion picture promotion, free software development, inventions development, scientific research, and civic projects.
Many characteristics of rewards-based crowdfunding, also called non-equity crowdfunding, have been identified by research studies. In rewards-based crowdfunding, funding does not rely on location. The distance between creators and investors on Sellaband was about 3,000 miles when the platform introduced royalty sharing. The funding for these projects is distributed unevenly, with a few projects accounting for the majority of overall funding. Additionally, funding increases as a project nears its goal, encouraging what is called “herding behaviour”. Research also shows that friends and family account for a large, or even majority, portion of early fundraising. This capital may encourage subsequent funders to invest in the project. While funding does not depend on location, observation shows that funding is largely tied to the locations of traditional financing options. In reward-based crowdfunding, funders are often too hopeful about project returns and must revise expectations when returns are not met.