I had one of these accounts whose rate never went up as interest rates rose. I kept it longer than I should have, but I eventually switched banks. (I wasn’t going to switch to their higher-rate “Performance Savings,” because screw that. They can pay a market rate, or they can lose my business.)
[Capital One] operated two separate, nearly identically named account options — 360 Savings and 360 Performance Savings — and forbade its employees to volunteer information about or marketing… the higher-paying one, to existing customers.
Source: NYT