From a big cock worshippers point of view, the answer is yes! I have paid (not any more) from (400-3200 SEK, about 50-500 USD) for one session. But that is not just showing a big cock, it's more of a roll play where hung guy brag about having a superior size, and also being condescending about smaller guys. And the money here is to make it more "real"...a way to show that size rules and that big cock is power.
And that is just one way of roll playing. I'm sure there are more ways to get paid for showing a BIG cock on cam. No matter how many horse hung guys showing off on cam, there are 100 times more admires out there.
J