1 Tunisia 100
2 Turkey 95
3 Venezuela 95
4 Ecuador 87
5 Peru 86
6 Algeria 84
7 El Salvador 81
8 Serbia 77
9 Colombia 75
10 Dominican Republic
Notice that none of the developed economies are showing up in the top 10. The dollar per user must be falling as users are increasingly coming from smaller economies which means less amount of ad revenue dollars.
It makes sense why Zuckerberg is crazy for China. Without another spurt of user base growth, Facebook's share price will not be sustainable.
