I have written before about the value of Facebook's homepage for logged out users: both from a promotional (huge lift for Facebook; both Facebook + Twitter do it) and advertising perspective (eBay example). Last week Fab ran a great ad placement for logged out Facebook users. No doubt he got significant reach and is effective because Fab does such a great job with social shopping / Facebook integration. However, it is still a strange concept to see - and market against - "everyone who logs out of Facebook today sees our branding."
Install Now: Driving Installs in Addition to Likes
I have written about Facebook's AppCenter before and how it represents the focus on mobile and on Facebook's platform... and opens up a monetizable, interaction beyond "Like": "Install". (And by the way: you could easily argue that "install" is a more valuable action thank "like" or "follow"). Here's a screenshot within the mobile web promoting Fab with a sponsored unit that is visual, includes ratings, reveals friends who use the app and, most importantly, a big "install Now" button.
Bonobos + Fab Looks More Like Groupon than Gilt.
I find this example so interesting: two fast-growing e-commerce brands working together to solve one another's needs: Bonobos delivers heavily discounted product to Fab, who delivers a user acquisition channel. From afar, I believe example is more similar to how merchants use Groupon / Living Social than how they use Gilt Group: it is more about attracting new buyers than it is for dumping inventory efficiently: