Blood magic nerfed in dom3?

[Huzurdaddi]

Blood magic is, basically, a method of reverse alchemy. It allows a nation with the proper mages to convert gold into blood gems.*

However near the end stage of Dom3 development the gold produced by provinces was doubled, yet the amount of blood slaves/gems produced was not modified ( note: the number of blood slaves/gems was changed to increase/decrease depening upon the number of magic sites ).

Perhaps it was determined that in Dom2 blood was far too powerful or maybe it was not considered. I don't know.

*the cost of producing blood slaves is equal to the sum of the following 3 costs:

(1) the cost of reducing the unrest caused by blood hunting, this is commonly, but not always done by setting the tax rate to 0.
(2) the cost of maintaining the blood hunters
(3) the amortized cost of purchasing the blood hunters.