I'm not sure it's viable to run large amounts of iMessage accounts, e.g. looking at https://bluebubbles.app/faq/ it needs a running MacOS machine/VM to work.
I'm not sure it's viable to run large amounts of iMessage accounts, e.g. looking at https://bluebubbles.app/faq/ it needs a running MacOS machine/VM to work.
RCS, on the other hand, can be spoofed with a bunch of other tools.