>We're not encouraging spam with this.

what you encourage and what actually happens are two different things, though. gmail does not actively encourage spam, yet most spam emails i receive are from gmail addresses.

you have to actively fight against malicious uses, like spam. "not encouraging" is nowhere near enough.

what systems/processes/safeguards do you have in place to prevent abuse?

For iPhone only users, so right off the bat your product is targeting 50% ish of a companies customer base. And the non iMessage people get a worse experience?

The last thing I want is an AI “thumbs up” or reaction over iMessage