Hm...this is worth trying. To get it to work, at this stage practically, the website would have to explain to users that it's basically a promise by the creator. The site could draft documents and give people some sort of equity certificate or what not.

But since I have no clue how this works legally, and really have no users, I can't go out talking to lawyers about some idea that doesn't have legs. I'll probably take the site offline in a week if posting on Reddit doesn't get users.