User blog comment:Brandon Rhea/Ad Tests on Fandom/@comment-5810007-20170427214339/@comment-20644-20170427220242

What makes you feel it's bad? I'd be interested in hearing more of your thoughts.

A sidebar ad that follows you is good for visibility and impact, which is important in today's advertising industry. Higher value ads, like one that follows on scroll, are what will let us remove other ads from the page and make the site look and perform better in general.