Well, qq space is more like an half-heartened adventure from Tecent. By its nature, it is in conflict with QQ the IM. And with success on the IM side, there is no growing space for qq space. It's never being updated fundamentally since its introduction.

So I guess the problem is that Tecent made the strategic decision to not pursue the social area in the same way as FB; and this is a good decision.

The only difference is Tencent doesn't have the impulse to shut things down periodically.