My company had a bank account at a local bank. It was an investment account, not used for daily activity. We had that account for many years. And for many years there was no activity other than monthly statements sent and an annual flourry of activity around our corporate year ending date (auditors needed to verify the amount, an annual statement sent).
They decided to start charging us a $10 per month maintenance fee. Our monthly interest was usually over 10 times that amount, but it still rankled me that they charged us. So I recommended to my board to change over. (they did, but that's another topic).
Some 3 years later, I still get phone calls from this original bank, wanting to know if there's anything they can do for us.
Yes, leave me the fuck alone. Had you spent one tenth of this attention and caring to us back when we were your customers, we wouldn't have left.
Bastids.