ORA used to cull all of the abnormal fish. Then, I guess people started asking for them and the snowball started rolling. I think that the threshold for deformity is just at the patterns since they did offer a "Stubby" clown for a little while a few years ago (it looked like someone stuffed it in a vice and bashed it's head in for lack of a better description). It's spine was crooked and the head and face were very deformed making the fish look like it was mostly head with fins attached directly to it. I don't think they went over well since that was the first and last we saw of them.
I think some of the patterns are cool and the fish seem healthy, plus they're tank raised, so there really isn't a downside to it as far as I can see. It's just that the numbers are limited and then most suppliers further limit the amount each company can purchase at any one time, so they can effectively control the price and keep it elevated. I think they did open the floodgates with their different strains to the point where now if anything is even slightly different it becomes a new and expensive strain with a name.