I just cleared browser data and tested again, and the ads still exist.
On the shields’ counter, it shows 10-12 ads were blocked (It’s not alaways the same every time), and shield is set to aggressive, block fingerprinting and block third-party cookies.
Actually I just found that it was a problem with my extensions.
If Privacy Badger is enabled on this site, Brave’s adblock cannot work.
When clicking on Privacy Badger’s icon on the site, it will show that “http://securepubads.g.doubleclick.net” was blocked, switching the setting from default (“Block entirely”) to “Block cookies” or “Allow” sloves the problem.
But why would it break Brave’s adblock? (Because both are blocking the same resource?)
It will be great if Brave can automaticlly solve or decect this kind of shield/extension conflit, since it’s a quite popular extension and there may be other users that are using it.
The issue isn’t with Brave here, the fix would need to come from the extension. No actual conflict between the 2, just the extension has rules that this site checks for.