I would guess that they are going for the tranny, bi-curious traffic...
Which is weird in itself because to put a horse sized dick on a female centaur eliminates profitability to some degree.
The niche is already different. Why not push male centaur traffic with 'horse dicks' to a male gay audience and maximize straight traffic by leaving the female modeled centaurs intact.
Then, once saturation hits a certain level, hit em with the tranny centaurs.
That's how I would do it if I had control of the niche.
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