Arum WON'T take this fight, no way. No matter what pressure is on Arum he wouldn't care. Arum could make false statements and fans will believe it easily because Mayweather isn't exactly a fan favorite.
Oh he will, without bothering either. As long as he has other options there's no reason to risk it all with Mayweather when he can still make millions out of a fourth fight with Marquez, rematch with Cotto or hell, even a rematch with Antonio Concheato.
A lot of us have realised he was doing this for a long time, but the vast majority believed him on a lot of issues. Now its so blatantly obvious what he is doing the general public have to turn on him. Your right though, not that it will shake him in the slightest.