Pretty sure you are correct. Clear Channel airports have 280 airports & Philadelphia is one of them. Those are for signage & advertising. Steve's contract is with ClearVision, which is an actual TV network.
So far I've only seen PRs for 4 airports with ClearVision.
Hey...it was only 3 a little while ago, so 4 is progress.
Steve did reconfirm not too long ago that we continue to be partners with ClearVision.