The endlessly-recycling-itself-positive feedback loop of receiving both actual money and spiritual/emotional validation from your community in order to pursue your creative ambitions. If you want to make a movie, and you've wanted to make this movie for your whole life, can you imagine then receiving a flood of money, love, and support from the people around you? Even if you don't make ultimately make your goal, that experience can be transformative.
We're a crowdfunding/community/love thing too. We have a person who is you for our community team, and reading the interview was like reading that person's last 2 years. I sent it to our you.
* Alright I'll add a question - what do you think was the spark whenever users fell in love with the product/community?