Some don't seem to be physically suited to be trying to entice people to buy clothes they are wearing. They are not well proportioned and don't look good in the clothes. I can think of one who has no waist whatsoever.
I'm sure standing before the camera and staying awake is harder than it looks. Very boring job.
Many of the ladies have other jobs, modeling and others. One is an RN so QVC is a "side hustle" for her. That why it takes so many. They work an hour or two then move on and somebody else replaces them.
New Mexico☀️Land Of Enchantment