- Charge the fans more, revolt guaranteed, "forgetting the root, ungrateful" and all that.
- Merchandise. Now teams change jersey every year -- with home, away, 3rd jerseys. Game, practice, and many more variations.
- Beholden to the leagues. Premier League is prime example, or for a scandal see European Super League.
- Advertising. Well, you know how HN hate advertising.
- Sell out to the highest bidders. Red Bull, private equity (Liverpool, Arsenal, etc.)
- Find a sugar daddy. Oligarchs or nation states (Roman Abramovich's Chelsea, Manchester City, Paris Saint Germain, Newcastle)
Pick the least evils.