This makes sense to me. Revenues scale with deposits, but many expenses scale with number of customers. Below a certain balance, the bank actually loses money o

This makes sense to me. Revenues scale with deposits, but many expenses scale with number of customers. Below a certain balance, the bank actually loses money on each additional checking account - better for them if you just go somewhere else. Also, the less money you have in your account, the less certain they can be of the maturity of the loan you've made them. Given they can basically borrow from the fed for free, why would they want your money?