I wrote one of the first OpenSocial wrappers so that making apps across various social networks was faster. Not all social networks perfectly supported the APIs as spec'd and had quirks:

https://code.google.com/archive/p/opensocial-framework/downl...

I made roughly 3 applications using it so that I could be faster than all the other developers building apps. Lots of people downloaded the framework when it was opened and some even paid for private copies of it early on.