With the release of every expansion or season, including Mists of Pandaria, we've reset the Junkies User group and tweaked the access requirements to be in line with what actual player ratings were. A Junkie is either a grizzled veteran player that has achieved a Gladiator Title in the past or a player vying for a Gladiator Title in this current season. Throughout the seasons, the rating required for a Gladiator Title has varied a lot: some Battlegroups in season 2 had a cutoff as low as 2050, while seasons 8 and 9 saw cutoffs as high as 2700.
Based on current ladder rankings, we've decided to lower the Junkies rating requirement to 2200. This is intended to reflect current ratings players are achieving on the ladders, and to create a more reasonable expectation for players striving to become a Junkies.
This change should take effect over the next week, so please wait while the user groups update themselves!