The required metrics are tightened month after month until it is virtually impossible to meet them. Once you get to that point, you're only making your hourly wage you were hired at AND they do not offer raises. Your monthly "bonus" is what they consider your raise, so you will never make any more than what you agreed to at hiring, no matter how long you've been there. Plus, it helps if you're a critical thinker and good on your feet because once you're out of training, you are pretty much on your own. There is support out there (is what you're told), but when you need it and reach out, there is rarely a response. For some, it can be a difficult (or impossible) learning curve.