There is no way to track if Ads is playing without any tricks. It would be nice to put some interface to track it.
You are tracking this to set some states in ContentManagerMedia.brs:
sub OnRAFPlayingAds(event as Object) isPlayingAds = event.GetData() if isPlayingAds SetState("RAFPlaying") else SetState("RAFSuccess") end if end sub
I think it's a good place to provide developer info if ads playback is in process.