It would be interesting to know more about the additional users. The banning of Shitter in Brazil is very much tied to internal politics and AFAIK it might be the Brazilian equivalent to MAGA that is currently mass-migrating to Bluesky.
If so, this might be a bad thing for them, as they probably don't want to get perceived as the Brazilian truth.social.
Bluesky is explicitly promoting their system as "choose your own censorship" kind of deal, which in the way it is framed could look very attractive to right-wingers looking for an alternative platform. While this is technically also true for the Fediverse, it isn't promoted as such, and rather has a reputation for the opposite, as most fedi server admins are center-left leaning.
Bluesky might be also more left-leaning right now as obviously there is little reason for right-wingers elsewhere to switch away from Shitter to another (mostly) centralised platform, but given the overall low user numbers this could switch very quickly.
I guess we will have to see how this develops over time and get some answers from Brazilians that have a deeper understanding of the current social dynamics there.
Due to the language divide it might end up as two distinct social spheres, like Fedi's Japanese bubble, but that's a best case scenario for Bluesky I guess.