If you have seen that film with Vince Vaughn and Ed Harris, I think it maybe a matter of the creator of the product, hiring good sales people..maybe similar the movie , they also work in selling something else, timeshare in Fiji, etc etc
and can recognize when they are pushing to hard up hill. times money but they have to call the number in front of them, coz like the days of night clubs youth, if you don't make any calls, you don't make any sales.