I’m assuming you mean United States when you say North America because WhatsApp is definitely heavily used in Mexico. (Not sure about Canada.)
In the US, most people use plain SMS, or if you break down after constant harassment from your friends and family, iMessage. I’ve definitely had people “joking” say, “Ew, you’re a green bubble!” to me more than once.
Ah, yeah. That’s why I’m wondering if I’m missing something… Like, cool. I know B sold my address… now what? I guess it’s a neat metric to know?