How it probably works: you’re giving them your apple id login details and they setup iMessage on a Mac mini in their server farm. They proxy everything. End to end encryption is no more and they’re lying about it or intentionally vague. Like “end to end encryption until their server”
Because they would need to purchase and maintain a massive amount of Mac minis, and probably also playing cat and mouse with Apple, this is expensive and has an ongoing cost. What’s funding this? OEM wanting to have this on their phones? Chat contents for LLM training? Worse like bots using your apple id for posting fake app reviews?
Because I can’t imagine Nothing paying a recurring fee forever to them, with the small margin they have it should be a small one time fee