Well, I tried opening the link mentioned in the article, but Opera told me it's blocked by the Content Blocker.
So I temporarily removed the /ads/ filter and tried to open the link again. Got forwarded to a different url and now Opera tells me this one is also blocked.
So I disabled Opera's AdBlock extension and tried to open the link again. This time, Google tells me that Ads Preferences requires enabled cookies.
So at that point I gave up and re-enabled AdBlock.