I was on the SFO-ATL flight in first this morning (757). The AVOD system worked through the whole flight without problems, but I did see those pop-up ads.
I was in the flight data screen for like an hour, wanted to check out the movies. Pop up.
Found nothing interesting and returned to flight data screen. Wanted to see the map like 30 mins later. Pressed the flight tracker button. Pop up.
Got one more pop up around 30 mins before landing when I want to look at the map again.
Turning off the screen won't let you skip the ad; when you turn it back on the ad will resume from where it's left off.
Annoying to say the least.