Yeah, the July 2025 shift to per-message billing made marketing way pricier. The country spread is wild too, India is ~$0.0094/msg vs Germany ~$0.124
I mean surely this was always going to happen? A fixed fee just means less frequent users subsidising everyone else.
I left WA in 2019, while the business api program was still very early, but that looks pretty close to pricing for SMS. Which makes market sense (imho) because it's a substitute good. SMS pricing varies wildly by destination country, sometimes by destination network.
Skimming the page, also note that the quoted prices are for marketting messages, other types of messages are much less expensive.