OK. I am not sure how you can say that any of this is wrong (although I commented on the sub count figure above likely being just the leaker having fun), but I got the answer and I understand it.
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It would be in line with having to re-level once again. Same idea as a reward for re-leveling a character for an allied race, really. And the flavor can be limited to basically different names for spells plus different colors and effects, maybe a couple different abilities like racials. Ie, it's cheap to develop, or at least it sounds like it.