Ball pythons are currently the epitome of herpetoculture triangle schemes.
As long as number of people wanting to breed BPs grows, there will be room for profit.
Once the number of breeders starts to shrink, profits for just about all morphs will shrink and normalize based more on cost of production than rarity of any particular morph.. however, the rarest animals will always command a decent price to let the hardcore hobbyists inflate their ego a bit having a one-of-a-kind ball python.