Such contrast in fortunes when you compare YouTube [0] and Grooveshark. Grooveshark, for most part, was an amazing service. They were at the forefront of UI design, brilliant at surfacing new and related content (music), excellent at quality of service (variable bit-rate buffering).
You would think that with a good exit to a company like Yahoo or Amazon, it could have really been a hit. I could easily imagine Google gobbling them up and merging it with Vevo. It isn't a dramatically different service than YouTube. But it wasn't to be.
Doesn't it make sense to open source code when you know the product is dying?
[0] http://arstechnica.com/gadgets/2015/04/23/cheaper-bandwidth-...