On Indiegogo, users can offer perks for different levels of investment  for example, people who helped to fund Hunts light could feel good about helping someone who is less rich, but they also got one of his lights as a present.

Indiegogo does not offer shares but allows users to offer perks for different levels of investment  people who helped to fund Hunts light felt good about helping the less rich, but also got their own light.
