Impossible to say what he stopped in fairness. Also in fairness Mckenna was putting up cash until fans did not heading up a consortium. Browns proposal IIRC involved a few thousand rangers fans and former players putting up 25k each or something like that.
Hard to imagine it wouldn't have been a step up from Green but we will never know.
Certainly he made things tougher for green and that was all good. I was there when we marched on Ibrox green was keeking out from behind the curtains. It may not have been the end of green but it may well have been the beginning of the end.
I have to say the bears who massively backed the season ticket boycott have a lot to be proud of.