Last time I visited Brazil some 5 years ago, the courts would ban Whatsapp every couple months. They were in bed with telecom companies that hated that Whatsapp made many of their services free.
There's a lot of problems with telecoms there, but WhatsApp actually has partnerships to enjoy "unlimited" bandwidth privileges with all four mobile operators in Brazil. Just checked and all four have such plans: Claro, Vivo, TIM and Oi.
The bans were because the courts were trying to coerce WhatsApp into responding to subpoenas.
The subpoenas were widely seen as a pretext among the population. It is Brazil: you have to read between the lines.
And that was partially already the case a few years ago:
TIM started free WhatsApp plans in 2014 [1].
Claro started in 2015 [2].
Oi started later, but it already had a similar plan in 2013 for Facebook Messenger, before WhatsApp acquisition [3].
Vivo seems to be the only holdout, starting in 2018, but that's far from proof that they were in bed with judges just to damage WhatsApp.
And frankly, "you have to read between the lines" sounds like code for unfounded conspiracy theories. Unfortunately something that is currently destroying the country.
[1] https://tecnoblog.net/170330/tim-controle-whatsapp-internet-...
[2] https://gizmodo.uol.com.br/claro-turbinada-detalhes/
[3] https://tecnoblog.net/131671/oi-facebook-messenger-de-graca/