Customers benefit the most from poaching being allowed. People determine who they buy/sell gold off based on prices and reputation. If we didn't have ways for people to communicate their prices, then the bigger reputable sellers would get bigger, and the smaller ones, and those looking to get an in to the black market would have a very difficult time doing so. Poaching is one of the ways to break the barrier, which I expect will be getting bigger with the removal of bonds as a mean to gain reputation (especially on feedback sites).