Adam, how can you possibly say you're not "for-profit" when in fact that is precisely what Blockstream is? do you seriously expect us to believe that Reid Hoffman, et al invested $21M while not expecting at least a 10x return on their investment?
I read somewhere that they invested personally instead of via organized venture funds specifically because they are bitcoin supporters and the investment didn't really meet the usual criteria for the funds (roughly described by you as a 10x return). I can't vouch for any of this being actually true or relevant, but I did read it.
That doesn't jive with this from their blog:
The round was led by Reid Hoffman, Khosla Ventures and Real Ventures, with investments from Nicolas Berggruen, Crypto Currency Partners, Future\Perfect Ventures, Danny Hillis, Eric Schmidts Innovation Endeavors, Max Levchin, Mosaic Ventures, Ray Ozzie, Ribbit Capital, Jerry Yangs AME Cloud Ventures and several others.
http://www.blockstream.com/2014/11/17/blockstream-closes-21m-seed-round/