I don't know portuguese so I didn't actually read what the deal is.
Is this a service where subscribers pay the carrier a fee for 30 days of unlimited data traffic to whatsapp servers (VoIP excluded) + 50M of data ?
If yes, does that constitute a transaction the consumer makes directy to whatsapp via the operator? I understand that likely whatsapp and TIM (an Italian company btw) might have made some deal and exchanged some money for the use of whatsapp logo etc, but I guess that transaction could have been done anywhere.
the app has in app purchase. that page describes both what you described plus paying for in app purchases via operator
> TIM is an Italian brand owned by Telecom Italia. Originally founded as a mobile telephony company in 1995
https://en.m.wikipedia.org/wiki/TIM_Brasil
> Parent Telecom Italia Mobile, Telecom Italia
you can't do that in brazil without having the papers to do business there. in fact, you can't even sell anything without the right documents. Just like everywhere else.