I don't see any reason too. Bp's shouldn't be housed together to accidental clutches shouldn't happen.
Seeing how cheap normals are already I don't see any reason too for pricing. Are people really going to buy a normal for any more than $50? Would anybody sell a sterilized clown for any less than it is worth when they could sell a breedable clown for what it is worth?
Seeing that a procedure hasn't been developed as far as I know chances are it would take a very long time before the average vet would even know that the procedure existed let alone perform an operation. I can't see it being cost effective if it is even possible/safe to perform.
I personally would not have any of my snakes/offspring undergo any sort of sterilization.
I seriously doubt that it would catch on and if it did I can't see it greatly impacting the hobby.
People who are going to breed BP's are going to do so... people who aren't going to breed won't regardless if their animal is capable or not.