Is total points really due to player activity alone?

[awpertunity]

Assuming your skill never changes, you should eventually (theoretically..) be matched up so that you win half your games at all times. At this point, with the +6 point bias, you are gaining an expected 3 points for every game that you play.

The only way to not gain points by playing as many games as possible is if you are losing more than 67% of them, but that shouldn't happen. As your number of games goes to infinity, your points will also go to infinity. Q.E.D.