User blog comment:Brandon Rhea/Making Ads Better: The Basics/@comment-35301431-20170117173154/@comment-20644-20170117205211

Simple banner and sidebar ads, in and of themselves, don't bring in the level of revenue needed to operate a site as big and complex as Fandom. So there's no way we could just stick with that limited set of ad units.

For video ads, we only want well-performing ones. Directly sold ads are going to be of higher quality. We also do not use auto-sound, so if you are seeing those then that should be reported to us because it is violating our ad policies. But in general, video ads are moving towards ones with better performance, and the performance will also improve as we remove more ad units from the page.