If the service becomes popular, I would imagine it could be hard to fulfill all packages alone or if you're just a small team. The only way to scale up is if you let others sign up and post, just like how Postloop worked. And if you go the route of Postloop you will have a problem with quality.
Hasn't Postloop shut down? And Forumwheel seems pretty inactive. I'm sure there could be a market for him.