Brazil's X ban is sending lots of people to Bluesky

Based on what evidence?

IG, FB, WhatsApp, etc are all still running in Brazil last I checked.

They previously banned Telegram, and might come for these other services next. But selective enforcement is also part of how injustices are performed in authoritarian regimes. Note that most websites and businesses on the Internet don’t need to have a local representative in Brazil, for example, though the Supreme Court justice here demanded Twitter have one (just so he could jail the person like an act of theater). The aggressiveness against Twitter/X could just be a strategy to compel other companies to quietly censor in behalf of the current administration, even if it would be illegal for them to comply.

Twitter/X has a local entity set up in Sao Paulo.

The previous administrator was removed and another wasn't appointed, running foul from the societal laws.

Telegram doesn’t have a local entity and complies with Brazilian law, which is the only thing that is required. There is absolutely no need for local representation of foreign entities in Brazilian law.

Twitter having a local office is simply a commercial decision - easier to conduct business, better relationships with customers, local tax vs duty over importation of services etc.