I worked on a project around a year back (something like fetch.io, but a stripped version) and had a deal with the employer that we'll be sharing the profits that are made from the service. He invested on the servers and the premium accounts with various file hosting services. I took care of the entire application. But he scrapped that project even before the beta is launched saying that the operation costs are more and he see no point in launching the service and also partly because of the legal issues involved in downloading and distributing content from other services. After reading this post, I feel like I should open source the code that I'm not using now.