It's not enough just to do something extraordinary initially. You have to make an extraordinary effort initially. Any strategy that omits the effort — whether it's expecting a big launch to get you users, or a big partner — is ipso facto suspect.
It takes enormous discipline to NOT try to scale something that's working.
But some things just don't scale -- and trying to do so can destroy the golden goose in the process.
Many entrepreneurially minded people can't help themselves from trying.