>
WhatsApp and iMessage require data plans, and as far as I can remember these have largely included unlimited SMS as well.The reason why WhatsApp was huge internationally (like, 10^8 users huge) was because many teclos in developing countries included data usage in their plans but SMS was extra (and talking minutes were finite), so people used WhatsApp for all comms.
WhatsApp's had a free tier, but their basic plan was (IIRC) $1/month, and they many (tens/hundreds) of millions of users that paid it.
Facebook bought WhatsApp for $20B:
* https://www.reuters.com/article/us-facebook-whatsapp-idUSKCN...
> Evidently, Zuckerberg lied to the European and American trade commissions. It was in fact possible to interface Facebook and WhatsApp platforms to mine data. Facebook has been doing it since day one of its acquisition. As always, Zuckerberg admitted to the misdeed, apologized and paid the fine. He got away scot-free.
> Months later, co-founder Jan Koum discovered that Facebook’s management weakened WhatsApp encryption system to make it easier for them to mine data. Koum resigned too.
> Fast forward to today and Zuckerberg continues to mine our data through Facebook, WhatsApp and Instagram (which he acquired in 2012). Facebook has become a surveillance behemoth – arguably the biggest surveillance organization in the world.
* https://www.philstar.com/opinion/2023/04/05/2256935/real-rea...