Technically I do have a part in the decision because that is how consumerism works and as you say it comes down to the amount of fans it attracts. By not giving my viewing hours to this game and instead giving it to other games I am basically telling the sponsors and event managers that if they instead hold an event for the other game they will make more money. After all it mostly is going to come down to the money whether these events continue or not.

There is a balance between the fanbase of a particular game and the scale of the events they put on. Popular games have tons of money thus have massive events. Niche games like this have significantly smaller fanbases thus less money and smaller events. Unless the fanbase of the game grows they can't afford to put out bigger events to attract more fans. So after a while, as more games come out, the fanbase starts to dwindle causing events to get smaller and smaller until the game just fizzles out of existence completely.