I took several more steps to try it out. Their main client Warpcast doesn't work at all if you try creating an account using a seedphrase. Maybe because I'm on Mullvad. 

I tried another client, Flink.fyi. if you create an account here you can't port it over to the VC backed Warpcast. Flink is barely usable. 

Supercast is another client that requires you to login using Warpcast. 

Farcaster is a clown show.