I think as the novelty of iAds wears off, the number of people who view them in otherwise empty apps will drop significantly. People who use the flashlight app could care less what was on the screen when all they want is the back to light up.

Considering implementing an LED flashlight is literally like 20 lines of code and a few .png files, I'm amused at how many (incredibly shoddily written) paid versions exist. I wonder what goes through a customer's head as he/she scrolls through pages of free versions to buy a $0.99 flashlight.