Advertisers impersonating Facebook ON Facebook

This “Mailbook” advert appeared on Scrabble, just below the normal Facebook toolbar.

"Mailbook" ad seen on Facebook

Seems dodgy to me. It’s a quite misleading way to try and get you to click on the ad.

Surprised Facebook would allow something that appears so similar to their own navigation.

Maybe they haven’t spotted it yet. I wonder if the icons are pixel-for-pixel copies?