I worked with a small brilliant team of Facebook growth hackers from Silicon Alley NYC around the same time as Aaron. We created Facebook Fanpage apps at scale. We had YouTube, Vimeo, Twitter and Pinterest Apps that could be easily placed on a Fanpage by the users globally. Millions of downloads across the suite of apps. We had quiz apps with over 50M users. Then Facebook changed course and we had to pivot. Facebook is still the place to be, but do not become complacent, as the rules change from time to time in the form of the 90 day breaking change policy.