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Well, Hilo.io is exclusively focused on crypto community. The projects you have mentioned are not crypto specific though they may have some channels for crypto like Solo has one for ICOs.

Sphere.social/hello is crypto specific. Because we can earn SAT coin from this site. Tokensale of this coin is ended. You can see more information from http://sphere.social/

By "crypto-specific"I meant to be only for crypto community.

Ok. I understood. Thanks for reply.