Nope, not the one managing it, we got a social media manager doing all the posting for us. Doing an ad campaign that generate this much new likes would cost A LOT, and it would also be visible in the insight as paid likes but there is none.
And yeah, I've noticed that the majority is from mobiles, but they say 40-50% of all fb traffic is mobile so I don't feel that is anything odd....or?
BUT...what is odd is the last 3 days shift in the like sources, check out the insight for the 8th and 9th:
Since this started mobile has made up about 50% of the new likes everyday, and the last 2 days it has only been 2-3% ...and been replaced with page suggestions instead.
...that doesn't feel like a natural behaviour, but then again nothing do about this. And yesterday we "only" had 722 new likes, gonna be interesting to see what today stops at. Maybe the "package" someone has probably bought to our page is up!?