I’m curious what their best-case outcome is here. It’s fully transparent at this point that Apple has no appetite for a third party iMessage client on any platform and will take whatever technical steps needed to prevent this from happening. I’d wager heavily that even if Beeper plays cat-and-mouse to the point where they’ve exhausted Apple’s budget for blocking them and somehow managed to avoid Apple’s legal team pu…
If this uses copyrighted keys then it will be a bit more tricky (although fair use could still come into play).