Please post if you find anything else out & I will do the same. Cheers,
I actually experienced something very similar yesterday. A very obscure KW - received only 1 click in the previous 2 1/2 months suddenly, and seemingly within the course of a couple hours, accrued more than 200 clicks. I'm following up with reps currently and have a ticket submitted to click fraud investigation. I understand market flux, but this is absurd.
Please post if you find anything else out & I will do the same.