I think the intended list of 'who would be making those millions' is limited to maybe 5 people (eg: Alex Honnold or Adam Ondra), not the hundreds who call thems

I think the intended list of 'who would be making those millions' is limited to maybe 5 people (eg: Alex Honnold or Adam Ondra), not the hundreds who call themselves 'pro climbers' (ranging from the top echelon of rock and competition climbers to dirtbags getting a discount on shoes).