Ironically, iMessage is not that common in Europe. WhatsApp and Facebook messenger won the game here (but they are also targeted by EU).
Anyway, I hope for Apple that they have numbers proving that this bullshit strategy really makes them sell more iPhones because it makes them look really stupid. In any sane society, nobody cares about the color of a bubble, in fact, as an iPhone user, I blame more Apple for the lack of basic SMS features than of the bubble color. I’d be a stupid friend if I pressured my friends to get a blue bubble, that’s insane.