It's not a bluff, just a reflection of the current state of Radio. As has been pointed out, WRVR and WMC-FM are too close in format, so FM100 lost. WRVR can tweak the format a bit and pick up some of the FM100 diehards.
They're really not, and WRVR probably can't. Moves like this that seem good on paper almost never work. Audacy, however, will find out the hard way.