User blog comment:Brandon Rhea/Ad Tests on Fandom/@comment-5810007-20170427214339/@comment-31555834-20170427232752

I think the reason he doesn't like ads that stick to the page is that it is pretty jarring to have a page move normally, but to have one little bit of is be completely stationary and detached from the rest of the screen. I also think that ads that stick to a page are a little more intrusive because they sometimes cover up a corner of a picture, and act separately from the page, which draws makes it stick out more. I think a way around this would be to make an ad that has a lot of vertical space, so it's always on screen, but it moves with the screen, so it feels less jarring and intrusive.