He financed Signal app after walking away from meta and an addition 3/4 of a billion or something like that. He publicly stated that they’re evil. When financing Signal App his one stipulation was don’t do that
I used it to talk to a girl I met in Europe that lived in Croatia. When we stopped talking, I stopped using it.
I had more friends and family urging me to get on Facebook messenger more than anything else, until iMessage really took off then it reverted to sms on my end.