Spent nearly 10 years working call center jobs, every single one of them had QA people listening to random calls and grading them. If you didn't stick to the script or try to sell the thing or whatever it was, you'd get a failing grade on the call. Enough of those and you're gone.

You're also graded on how long each call takes based on a metric called "Average Handle Time" or AHT which was set by the client based on whatever fucking fantasy they had about how long each call should take.

Fun fact, some contracts I worked on had an AHT requirement that was lower than the amount of time it would take to go through all of their required scripted sales pitches without even addressing the reason for the call. It was literally impossible to get full marks because you either had to skip most of their required scripts, not help the customer, or have the call run long.