Like someone else said it’s money laundering, for drugs or anything else.

Possibly to reduce “rides” that are just drug deals. But equally possible just Uber being shitty.

Wrong.

“let domestic abusers find out their victims are trying to contact a lawyer’s office over Signal”

It lets anyone know you have a Signal account true, although you can (and have been able to for a while?) disable being found by phone number so…