Was a bit reluctant to respond when I noticed that Jaylock was the OP... don't like being flamebait, but what the hell here goes...
Sales figures tell you little about the quality of the game. If anything, subscription does. If people continue to play then you could argue that quality is good. There are also movies that did extremely well in the opening weekend then when it turned out to be bad the public stayed away from it because it sucked and the word spread.
Also, there's a financial crisis going on worldwide that is hitting some countries VERY hard. In EU for example Spain and Greece are having a very, very hard time. Lots of people losing their jobs and having less to spend in general (even for those that do have jobs). In countries that are less affected people are also cutting back on their expenses. And guess what, most people would probably cancel their game subscription or decide not to purchase an online game instead of not having a meal....
And in the end, why should sales figures matter to you anyway? You play a game because you like it, or it appeals to you, not because it sells well....
at least that's what I hope...