In my experience, editorial departments of most outlets are no longer separate from ad sales. On paper, maybe, and as a concept/line that too brass can say publicly, but the four major outlets I’ve worked all had edit staffs that end up being influenced heavily by the business side. Sometimes censorship, sometimes decision making and influence.
There's a reason editorial departments are totally separate from ad sales.
FTC disclosure of paid content is extremely important and taken very seriously (at least where I worked and by the FTC).
IMHO Facebook doesn't have any reputation left to tarnish, but Teen Vogue screwed themselves here, badly.