This isn't about customer "profitability" - that has nothing to do with why Chase will close accounts.

It's the opening of multiple credit cards throughout the year, imbalance between spending and income, maxing out your card then paying off the balance several times a month, $500 purchases at Office Depot or Stables twenty times a month, bla bla bla.

Don't try to "game" the system or you'll lose. My guess is that every single person who has had their account closed has had that account closed for good reason.