Interesting story.
In a survey of nearly 200 senior marketing managers, 67 percent responded that they found the "dollar market share" metric very useful, while 61% found "unit market share" very useful.
In other words, you can mesure you market share in both, Revenue (via your cutomers) or quantity (number of customers)... in the end, it is always related with customers. Professional sport teams need quantity. Followers. Fanbase. They do not exist without fans. Their revenue comes from them. The more fanbase you have the more customers you have. The more fans you have, the more people wach you. The more fans you have the more revenue you have. The more revenue you have, the more market share you have. The more market share you have, the more the value of your company is. You can operate in a big territory. You can operate in small territory. If you have no fans, if you have no one who watches you, if you have no customers, you won't have revenue. Hence your company loses value. Hence your company loses market.
That's the value chain. Advise, take care your customers. They are the most important thing. (local/domestic/foreign). Big Market teams have in common a huge fanbase/followers (customers), beyond where they play. if they play in big market places/territory, doesn't guarantee a big market share=revenue=customers=fans. Plenty of examples are out there. We have mentioned several.
Are fans/followers a good thermometer in order to rate the value/market share/coverage/importance/size of a professional sport team?. If you agree from what I said, the answer is pretty simple.