I found that if you dont join an arena game after queuing you still get team credit for having done a game.
This can be exploited if you make a team only to loose and get points. Simply do 3 games (minimum needed per player) then que up 7 more times. End result, you only lost 3 games worth of points instead of 10. This could also work if u win 3 and are dont want to risk looseing any points.