I wouldn't have been upset if they had just adjusted the number or type of gems needed at the zoo. That would have made sense. The problem was them saying "Have too many gems? You can now sell or exchange them with Aurilio at the helicopter. " Then they waited a few weeks, and THEN switched the gem mix so we then needed the item that had been unused for months. Classic bait and switch tactics. They obviously have the right to do that, but if the result is angering their customers, especially to the point of decreasing their purchases, it is foolish tactic in my opinion.