I remember when I got started doing mortgages, we had a guy Joe (RIP Joe), who used to come in twice a week, pick up a white pages, throw it on his desk and whatever page opened was the page he would start calling people at for loans. Joe would rip through 2 pages in under an hour, and walk out of the office with 3-4 loan apps a day. The man was a machine, better then any robocaller system I have seen. He would literally come in twice a week and close 30-40 loans a month.
Nowadays thats a heavy fine and criminal thanks to the Do Not Call lists.