My experiences of three Supporters club branches is they are long term blues with season tickets but none of them pay £50 a season for double points.
Branches also are very much restricted in their allocation of 'contentious' matches and in the branches I have experience of, not all members go to away matches, and go to meetings to meet and talk City with fellow Blues and listen to the memories of people like Glyn Pardoe who nearly died as a result of a tackle by Best about 40 years ago, something the BlueMoaners will be unaware of.
Sorry to pop the bubble of an urban myth heavily promoted on here.