Idea is good, But name is shocking, Besides is not free it cost 1 FBC , Besides peoples must are interested on run your client, So that you need a way of how do that.
The name means "tweet like a free bird".
A decentralized system need block fees to encourage the running nodes. More running nodes more decentralized.
Consume tiny fee to speak freely is not a bad choice for some people under observation of government control. Like Chinese.
These people will need FreeBird.
And in FreeBird, sending private message is safe. Third party can't decrypt or read it.
OK, Agree this looks legitimate, Good luck with the project, I will keep watching this.