Compared to the # of users -- i.e. orders of magnitude greater -- that's a pretty reasonably-sized team.
But for ad-fueled companies the bar to profitability and long term success is quite a bit higher:
Alphabet does about 4x that ($1.3M/employee/year) [0], and Facebook does even better ($1.8M/employee/year) [1][2].
[0] https://abc.xyz/investor/news/earnings/2017/Q1_alphabet_earn...
[1] https://investor.fb.com/investor-news/press-release-details/...
https://www.fns.usda.gov/sites/default/files/pd/SNAPsummary.... http://www.politifact.com/truth-o-meter/statements/2016/jul/...