I wouldn't use a third-party website as any indicator of population. Keep in mind that not only is this an RTS game that is centered in the same universe that is catered towards FPS players (console and Halo fans) but it's also a game that sports 6 people max per game. This essentially means that a lower population isn't as big of a deal because the game doesn't NEED as many players. The community is also split between PC and Xbox. I believe cross-play will need to be implemented eventually. And I don't really want to hear the whole, "But muh mouse and keyboard give me such an advantage!" Well, normally that would be true but not in this RTS. This one is fairly simple and when I play on my PC I still use a controller and have beaten some of the top teams with it.
I know I strayed a little off-topic on that but the point is the population is fine. But at some point cross-platform matchmaking will need to be introduced, I do believe.
But that third party website does what 343, MS, and CA won't. It gives us the MMR of anyone (which is a way better indicator of skill than you can see from someone's rank alone.
Also I just want to get this streight ok. I thought people can't say something is dead. Like, I thought that is off topic or something. I'm not breaking the rules here in just simply asking if this is ok and why.