Right now in only into POB. I really like Splinterlands but the Splintertalks is not too used right now.
The ideia behind proof of brain is really appealing to me, since you have to be original to get some good upvotes, or to bring engagement to the community. And the economics of this coin is also very interesting: The only way to mint is through votes and curation, and has a roadmap similar to Bitcoin (only 21.000.000 will be issued)
If you don't know POB yet, I invite you to join us!