How would you like your competitors regularly to report to you all of their upcoming radio promotions, format changes, etc.?
Well, you could plant or recruit a spy at all competing stations. Among other drawbacks, that might be illegal (“industrial espionage”).
Or you could take the suggestion of radio promotions guru Doug Harris:
Join all of your competitors’ “loyal listener” clubs.
Like most great “creative” ideas, this one is elegant in its simplicity and potentially rich in its rewards.