[SirensOfTitan]

If you're going to use that metric, use ~1.25 B for Facebook (monthly actives on mobile).

1.25B/80m = ~16 times. The average Facebook user in the US spends about 40 minutes on FB per day (not sure of mobile vs desktop breakdown):

16*40minutes = 10 hours per day on Pandora on average. Absolutely no way.

[jbverschoor]

I'm not sure if "checking facebook" is the same as "interacting with facebook"