So if you look at it now the fans are the ones with the lowest power because they simply watch from the outside but have no direct influence over their clubs but on the other hand they also are the most powerful in a way as the clubs probably wouldn't exist at all without fans.
It is true that fans are a very important element, but they are not the ones that have more power.
An example of this was Soccer. In the United States, football (known as soccer) was not very well known and had very few fans.
But, with a large financial investment, marketing and attracting famous players from Europe, they managed to grow and now have a good number of fans.
They started, practically without fans, but with the money invested they managed to grow and already have a number of fans that it pays to build specific stadiums for this sport.