The exploit in question was only available to linkshells involved several endgame activities. The basic premise was finish the activity and then before the item drops from a treasure chest or monster the alliance of parties would break into their separate groups. For you Warcraft players, a raid would cease to be a raid and break down to the parties involved. Then each of the 3 parties in the alliance would get a copy of whatever items would drop. So, instead of 1 set of loot, you would grab 3 sets of loot -- including some items that could be sold for millions on the auction house.