The fun little proofs that you can do with algebra - they are sort of like crowd pleasers in a way. Like, the. 9 repeating equaling one. It doesn't take a lot of algebra to prove that, and it's really fun. It kind of wows people. It's like they're watching magic happen right before their eyes.
There is one purpose to life and one only: to bear witness to and understand as much as possible of the complexity of the world -- its beauty, its mysteries, its riddles. The more you understand, the more you look, the greater is your enjoyment of life and your sense of peace. That's all there is to it. Everything else is fun and games. If an activity is not grounded in "to love" or "to learn" it does not have value.
The ventures that keep things light and fun, easy to understand, that have a compelling story, a sexy retail product, will have an easier time getting people to rally around them and contribute. A start-up doing something that's difficult to communicate or doesn't offer any kind of retail product will have a tougher go at it.