Originally Posted by **********

Nothing. Tube sites are too compelling. If the watermark is on the video it may get noticed but all the user cares about is what he can watch next. If the add pops-up over the add all he wants to do is close it to watch the video.

Only if the ad is super-ultra-mega targeted will it possibly generate a click. "Hot girls click here" or "free porn" will not even get noticed.