Board Thread:Technical Updates/@comment-22224-20180806210818/@comment-126761-20180808202637

While that is true to some extent, we do have rather more control over what ads display on the site than we did in the past. As FANDOM has increased in stature, we've been able to start dealing with many advertisers directly, rather than relying on third-party ad networks.

That said, ads can still be misconfigured (or just have bugs), so we definitely appreciate reports of issues via Special:Contact/bad-ad - they all get investigated.