I get Apple's "this is our toy, you won't be making $2/month/user on us".
But "keeping the spammers out" it's a bit.. weird..?
Can someone please describe the WHAT is the technical advantage of Android users to spam over iPhone/Mac users to spam.
Nothing, that's why iMessage is full of spam already.
What scammers do is buying boxes of old half broken iphones and they turn them into relays exactly as you said.
We're also talking about old, non-updated iOS versions here, jailbreaks are more likely to last when they target these versions.
That’d be pretty difficult to get second hand, especially when you can just spam over SMS.
They could even release a new iMessage protocol with another bubble color and let the blue ones become uncool.