They flog twitter all the time. Every one of their broadcasters has a account abd they all refer to them throughout their shows!
Not flogging twitter on their material has nothing to do with money. They don't get paid to do it, nor does it generate them money. It does generate publicity for Twitter (not that it needs it any more) and, in their words, "will no longer be part of the biggest sports radio in the world". I repeat, nothing to do with money.