lots of reasons maybe
1/ summer is here for many who want to be outside with family. will get better in fall
2/ wwiiol is out and lots of people packing into it to see what its like. (yuk, but has potential. about 6-8 months too early. still a beta)
3/ il-2 beta in process and lots if new guys being added. this ones a real winner and going to get a lot of business at 32 players but when mmp is put in its going to be the wwii online sim imo. cfs3 is also coming out in mmp format.
4. targhet korea are up to something with their close beta. i think they;'re adding tons of new people which might be drawin lots from here, don't know. this one looks pretty exciting and could be the hit of next year.