The most recent earnings report for Facebook was their second quarter earnings. Total revenue for the trailing 3 months was $1.81 billion and 41% of that was mobile advertising (according to this CNBC post).
$640 Million in Mobile Ad Revenue
The math works out to be about $640 Million in mobile advertising revenue for Facebook in one quarter. That is quite impressive. As many companies are trying to figure out how to monetize their large mobile audiences, it appears Facebook has.
Mobile active users for each day stands at 469 million on average (that was in June). That is quite impressive. Their monthly active users on mobile stands at 819 million. Depending on the overlap, it is possible that of that 469 million they have a userbase that is addicted to them.
Earnings were at 19 cents a share verse 12 cents the prior year and the estimates were around 14 cents.