It's weirdly centered and shows up seemingly at random for each article - it makes editing a chore since I don't where images and headers/subheaders/pullquotes are going to line up with that ad. Since the add already is centered and has lots of white space it can really ruin the looks and format of a post right now.

If we are doing an ad like this it would look much better in the right-hand content gutter or in a uniform manner that also adds less white space.