As for an actual answer: parties, weddings.
But in all seriousness, "free as in freedom" seems fine to me but it is replacing the already unambiguous "free as in speech". You're still stuck with the sometimes-confusing "free as in beer" and they're still cumbersome compared to gratis/libre.
This is the one that they know they have absolutely no grounds to demand, which is why they started with it. Everything else can be conformed with without even really damaging Nitter (the project.)
> 4. Delete all X account credentials and session tokens
could be trouble for individual servers, but is on legally shaky ground, and servers can simply go down at the first strong challenge and open back up under another name. Nitter the project doesn't need to have any credentials or tokens.