[HelloUsername]

I thought you can register Signal with a virtual number, then in settings simply hide the phone number, and create new chats with your username?

Also, what about Briar/Berty as alternative?

https://play.google.com/store/apps/details?id=org.briarproje...

https://apps.apple.com/app/id1535500412

[Arnt]

I'm curious. What happens if you do that and immediately send messages to lots of people?

Will all if the messages be delivered promptly, or will most be delayed until the first few recipients have either replied or have reported your new account as spam? I don't know, I'm curious.

Signal appears to have the necessary information to compute spam prevalence per virtual number provider.