I wonder if crypto-tokens could be used as an easy way of quantifying open source contributions? Famous GitHub projects could assign and pay their own custom tokens (not exchangeable for money, permanently tied to an identity), on the basis of issues and PRs. It would also be easy for developers to link these tokens on their resume while applying for jobs. The proof-of-PR token could even be used to skip interviews altogether.

All these ideas seem pretty low-hanging fruit for cryptocurrencies.