Does Mercenaryy BG even work?

I signed up for this on the website hours ago and I have yet to play as Horde. Does this still even work? I'm on Blackrock.

It works and it's mostly active for Alliance. You'll eventually get put into Horde group dw.

I'm a Horde player on Icecrown and I have it enabled, I would love to se the Alliance perspective of a BG but I allways get into the Horde team, and I have played a lot of BG's.
Would like to hear what the chanses are to get faction swapped to Alliance from other Horde players who does a lot of BG's.

It's work. Mecenary mode is here too balance the overload of alliance pvp players. So if you are on horde side, you 'll stay as horde. (there are a few chance you 'll be swap, for that, horde player should be more than alliance player)