I used to get a bunch a couple years ago. Since then, I've deleted all Instagram, Facebook, Reddit, Snapchat, etc. I only use Lemmy. No more spam or phone calls.
I also use separate phone and phone number for banking and actual important stuff so that phone is off until I need it so ymmv
I've gotten a couple in the past few months, and it definitely seems to be a thing/have been a thing: https://www.howtogeek.com/721043/why-youre-getting-so-much-signal-spam-and-what-you-can-do/ https://www.androidpolice.com/signal-is-taking-the-fight-to-spammers-with-new-message-requests/
TIL. I didn't even know this was a thing!
I used to get a bunch a couple years ago. Since then, I've deleted all Instagram, Facebook, Reddit, Snapchat, etc. I only use Lemmy. No more spam or phone calls.
I also use separate phone and phone number for banking and actual important stuff so that phone is off until I need it so ymmv