Ms. Frizzle, (from the Magic School Bus), said: "Take chances, make mistakes, get messy!"
Or more simply: "Fail Fast!" (quote claimed by numerous entrepreneurs)
So... here's what I'm going to do: Version 0 will be the bare-bones, absolute minimum needed to make the AboutTh.is concept work. It'll be a sandbox in which to play. But there will be an underlying truism, known to all participants: The database will be wiped clean, all Member-generated files will be deleted, and all URL's will be broken for Version 1. Version 1 will be what I'm comfortable releasing into the wild, and that's when the persistence expectation will start. This will have the Basic (free) functionality that anyone will be able to use. Any prior participants will need to re-register, since the prior database will be gone. I may start with an invitation-only approach during the beta testing period, so as to prevent unrestricted growth too early, but that'll obviously have to go away. Version 2 will include the Pro (paid) service. Version 3 will have the affiliate program and paid advertising will be managed through the database.
I'm sure I'm forgetting a lot, but I just wanted to put this out there... quickly! ;-)
Update: Published the Alpha Plan.
(*) ... with apologies to Robert Fulghum. I think I actually started kindergarten shortly before Sesame Street started airing on New York's public channel 13, far earlier than the Magic School Bus.