I bounced once I hit the friction of picking an instance. It's not something you can really join without knowing in advance who you want to talk to or what community you want to join. Like slack or discord, I'd use it to talk to a specific community that is already using it, but not to just join and see what's there, a la twitter or facebook. The flow for it goes community -> platform, rather than platform -> community which is a very different niche I think.