I think it’s quite an interesting idea–I would love to see “open source companies” that are able to get revenues (e.g. by selling the app on the store) and split those revenues within the community, like you suggested.
I also think it’s premature. SourceCred hasn’t yet been tested at all, and I think we should first get it working well for the SourceCred community itself (see the CredSperiment and deep then wide). Once we’ve got some initial promising results here, it will make sense to start going broader with followon instances.
Of course, since it’s an open-source project, no one is stopping you from giving it a try if you feel it’s a good idea. 