What they did was another type of exploitation. Not as serious as Paragon and the others, but they beat the system.
People, this is NOT hard to understand. Look at their damn spreadsheet. http://i.imgur.com/LXX8t.png
They rotate three NEW core members who have not seen LFR loot for the week and who are on different tier tokens. The rest of the raid is comprised of 22 alts. Once those three people have seen the bosses die, they hop on their alts and three NEW core people come in who have not seen loot for the week. The only people who get loot from these runs are the three people who have not seen loot drop for the week. This is NOT an exploit or a hack; it's smart.
You don't have to be a scientific rocket to understand this.