I've recently heard something about Unity hub.

[Undertake]

Recently, I've been hearing something about Unity acquiring a company that specifically specializes in spying on people and monetizing their data? I'd like to know more behind this, since my brother currently uses Unity hub, so me and him want to know if there are certain risks about using it, considering the news.

[Goodly]

It's been fairly overblown. If you want details this is a good video going over the merger and some other recent Unity events.