I think it would be interesting to reward users who invite external users to Farcaster and those latter users are active.

Crypto Hedge Fund Manager in Luxembourg and Founder of CryptoPlaza.es. CEO of Roble Venture Capital. Metacartel member. Superfluid and MakerDAO Ambassador

How do you judge quality vs. spam / gaming

I believe the ultimate goal would be onboarding all real people, and I think effective tools to recognize human profiles would be very useful. In that sense,I believe that gaming is one of the best allies. Of course, I'm totally opposed to spam.