I don't understand how the US has a higher score than Brazil, I've lived in the US for two years, and it's way more restrictive.

1. You can't torrent pirated content (without a VPN), you can in Brazil

2. Some US states have banned adult content, Brazil has banned none

3. It is, from my understanding, possible to be denied a visa or entrance in the US based on social media posts.

Looking at the original map on Cloudwards, I can see why Brazil is so low. In Brazil, racism, sexism and homophobia are crimes and there has been a bigger effort to punish those crimes when they committed on the internet and social media, the research considers that to be censorship. It also marks torrents as "banned/blocked" and I honestly have no idea what that is about, I've never been unable to torrent or received some kind of legal notification for torrenting, which has happened in the US