Disagree on this, there's no reason winning NC/AM/IM/Main can't mean something especially for players with only a few seasons' experience. People know that the ADV/Invite champs matter more by definition because they're the highest divss. To use the real sports analogy, everyone knows that the World Series is the top championship of all baseball, but that doesn't mean collegiate teams can't be proud of their College World Series win or even a little league team can't be proud of their LLWS win. Of course it means a fraction of what the real World Series does but that doesn't mean it's not an accomplishment. We recognize that those levels of play are a stepping stone for less experienced players as they rise towards the highest level, just as we do with the RGL divisions.

I would think teams like this one that were interested in learning and getting better as a group would seek to be in the paid division with two matches per week and better competition instead of the unpaid division with a lot of teams who just play for fun, but that's just me...

What extension gives those minus numbers between the team and the name and what do they mean?

He isn't, but we generally dislike him for spreading misinformation.