This strategy seems pointless because the one remaining "category killer" aspect of Facebook which they can then market is the
friends communication interface. If people stay on Facebook and maintain the same friend interconnections, Facebook wins 85% of the battle anyway.
I thought of advising friends to set up a fresh browser specific to Facebook usage, using it only incognito and clearing after every session (as I do), but benefits of such precautions would be wasted in the big picture of interconnected friends, most of whom see no downside to being productized.