Our Meijers (regional grocery chain) has small flat screen TVs at all of their checkout counters. According to the advertisement on the screen, you can rent screen space to advertise your business or what ever.
But, I suspect that they have a screening process for these ads. After all, they wouldn’t want an adult product store advertising. Nor would the want D&W (local grocery chain) advertising. And, I suspect that the ads are expensive.
Personally, I never pay any attention to the screens as I am usually too busy reading the front of the tabloids. After all, how am I going to know who Brad and Jen are with this week.