It was absolutely an error
The same kind of error Barbra Streisand made

“It feels like the folks who own these companies have an interesting perspective on what the First Amendment is,”

Yeah, unfortunately it applies to state, not private entities. A social platform muting you is just a bigger version of a community mod doing mod things.

This does all end up being free and effective marketing for him anyway, and he'd know it.

An “error”. Riiiiight.