Welcome to the real world, Facebook
Just when the US.gov dumped the Obamacare website on GitHub, nothing magic automatically happens by open sourcing something - especially if the project doesn't fulfill a need or has legal/political baggage.
In the open source world, your code has to be clean, useful, and drama-free before it even has a chance to succeed, which may take years. Seeing how companies like Facebook and Twitter withdraw API support whenever anything threatens their business model, it would be technical suicide for a company to tie its future to one of these projects when the sponsor has other interests or is fickle in their technical direction.
If you can make it in open source, you can make it anywhere, but the reverse is not necessarily true - just because you can attract investor money doesn't automatically make your IP desirable or useful to others.
Biting the hand that feeds IT
