Here's a discussion about why lobste.rs blocks (or blocked?) the Brave user agent: https://github.com/lobsters/lobsters-ansible/issues/45

Here's a hacker news discussion about the issue: https://news.ycombinator.com/item?id=18734999 (archive of the linked tweet: https://web.archive.org/web/20190203094117/https://twitter.c...)

EDIT: Oh, and we can't forget the time when they silently changed links to contain their own referral codes: https://www.theblock.co/linked/67594/braves-browser-has-been... (HN discussion: https://news.ycombinator.com/item?id=23441605)