There's a reason that Twitter and Google label things as sponsored ads. It's because when you are providing a service, there is a direct conflict of interest b

There's a reason that Twitter and Google label things as sponsored ads. It's because when you are providing a service, there is a direct conflict of interest between your user experience and your ad sales. If you don't draw a line between advertising and organic content, then you severely risk degrading the content your user receives, and it doesn't matter whether you think you are or not (clearly Facebook thinks it can toe this line), but as soon as users perceive that the content they are receiving is more payola than popular then you've killed the golden goose.