What's Holding Back the sales funnel understanding Industry?

https://alpha-wiki.win/index.php?title=The_Most_Influential_People_in_the_clickfunnels_discount_Industry_and_Their_Celebrity_Dopplegangers

A funnel is a tube or pipe that is certainly wide at the very best and slender at the bottom, used for guiding liquid or powder into a small opening. Funnels are often made of chrome steel, aluminium, glass,