They do, fact. I have near neighbours and mates who are separately Newcastle and Spuds fans, all of whom are Bronze members, simply to buy the one Amex ticket per season. £60 all in to watch your beloved club is a bargain compared to the prices touted on Craigslist etc, or to go corporate for...
Sky and BT always show loads of fans wearing them before virtually each PL game. Sometimes bloody unlikely combinations where there was an intense rivalry.
Some people must have a huge and growing collection at home.