Well, the most likely scenario is that you will click their thing. Why? Because you're thrashing around on your mobile screen trying to get rid of the pop-up or overlay.

Whether you succeed or not is immaterial: the ad got clicked on, and hey, even if 99.9% of those clicks are accidental ones that will never convert, they still look like "organic" clicks and the ad revenue still gets booked. Expensive consultants like this person ( https://news.ycombinator.com/item?id=12944902 ) will chalk it up in the "users engaged" column. Everybody gets what they came for... except you and me.