I think often there is no promotion, a company will just hire a new employee to work in a warehouse or something for $40,000, call them an "Inventory Analytics

I think often there is no promotion, a company will just hire a new employee to work in a warehouse or something for $40,000, call them an "Inventory Analytics Manager" or whatever, and then declare that they are exempt from overtime because they're a manager. There is no change to notice, you just start the job and never realize the company is illegally underpaying you. Your colleagues all have the same title and every other company you applied to is doing the same thing.