Comment by utopiah

> make the cost of the signal match what it claims to represent.

Well that's the WHOLE problem of trust. There is so much work on blockchain in proof of work, proof of stake, etc in order to protect ourselves from attacks, e.g. https://en.wikipedia.org/wiki/Sybil_attack

If you do find a way it would apply to a lot more than "just" GitHub star for VCs.