Quoted from j_m_:
I don't understand why everyone feels entitled to someone's hard work just because they don't complete something, don't feel the need or never intended to sell it.
Everyone doesn't. I personally think that sharing non-commercial stuff makes the world a better place. I do it all the time with software and PCB designs. Hell, we wouldn't be having this conversation without a stack of open source software residing on the pinside server.
If they don't want to, that's fine, too. If it were me, and the project was well and truly dead, then I would release the files with a non-commercial license, hoping to see someone bring it home.
Of course, since this is not an original theme, some of the designs might infringe upon commercial IP(intellectual property), so it may all be a moot point anyway, as sharing it publicly might expose them to legal action.