First pioneered by Socios and followed by Binance "Fan Token" was created to strengthen the relationship between supporters and a club.
With the lure of various advantages such as membership, exchange tools for club marchendis, and voting rights, in fact this does not make "Fan tokens" desirable.
This is proven by the low average price of "Fan tokens" such as $JUV $BAR $ASR even though these tokens have a low average Maximal Supply.
Basically, fan tokens do not have to have an underlying value (or the crypto asset on which the price is based) bitcoin or ethereum.
In other words, the value of a fan token is measured by the value of the fans who bought the token and the value of their loyalty to the club they like.