If you're putting your fans to work, let them know they're on the “inside family” now. That if you hit it big, THEY hit it big.
No need to make specific promises. It's a feeling more than a contract.
Same with your casual fans and email list. Make them part of an exclusive club. Bring them inside.
Everybody wants to be able to say they hung out with ____(your name here)_____ when she was just playing little clubs in her hometown, and now look at her!