just like Facebook... many people threatened to leave and they never did. so believe me - you won't close your account with them
and why don't you try opening up your business and not charge a dime to customers. See if you can survive with free service especially when it costs you money.
They are not making profits on interest rates... It's you. You are making them richer because you are borrowing THEIR money. That's business. Do you expect to borrow their money for free??? I wouldn't open banking business if everything is for free! lol!!!
Simple - don't rack up debts or borrow money