[rhubarbquid]

It's almost like there's a reason the FTC requires disclosure of paid content...

[ogre_codes]

In this specific case, it was clear Teen Vogue and Facebook were trying to do exactly that, and the fact that they pulled it suggests to me that omitting the "Sponsored Content" warning was part of the terms of the deal. I suspect this is extremely difficult to police and people get away with it all the time.