That's a really interesting effect! Thank you for making me aware of it! However it should be noted that the reason it backfired, was because people exploited a weakness in the system, so to speak. It could even be that they did something illegal and fraudulent, since the bounties were obviously for animals that weren't bred in captivity, and for wild animals that were properly killed so they wouldn't be able to procreate. Thus the question remains on whether the measures had effective ways of dealing with such fraud, or whether that would make the whole thing more expensive than other measures.