It was a system like this here in 2013 ( I think, might be 2014, my memory is failing here) when there was no "breeding takes out parents" system. Our market was flooded with the same exact pokemon, people with good IV dittos were flooding breeders and at first it allowed them to gather money, only for the market to crash with too many pokemon being in the game and increasing the IVs of them without any practical penalty.  It was really hard to make money out of breeders, so catching pokem