I don't use superthrive although I am aware that using the product at wrong time can cause funny things on flowers.
I don't believe superthrive or hormones are the cause of peloric, though.
It is just random mutation on the genes responsible for development of petals and sepals.
Are hormone use the cause of this mutation? I don't know for sure.
Mine is a good example, because it came normal and the subsequent blooms are pelric, and I never used hormones or superthrive on this plant.
I believe unstable genes on this particular plant, unless perhaps there's some crazy virus playing with the genes randomly. haha
Whatever the cause, pelorics are not even considered for entering awards I heard.
Some people do like pelorics, so there are still sold but at very limited amount.
I really am not a fan, but my little sold magenta phal is an exception. It was bought as normal and was like $5. and I love the color, so I keep it.
With that said, again, I like yours for some reason. The dark pattern against white and the overall shape just blend well together. strange good, isn't it? haha