Eh, while true, 20 different games can be a tad confusing to some players who are new to a forum. Yes it's neatly organized, and it may have multiple subforums for each board, but the amount of work involved, that's rather complex. I've no doubts it can be done, but my thoughts are that it could get confusing if RiliSoft decides to hone 20 games to one single forum (the backups would also be harder, since it's one large forum, and you wouldn't have multiple backups for different boards/forums).
Nonetheless, I see your point, 2 games for one forum isn't too bad. But if RiliSoft starts pumping out games like crazy, we may want to consider branching the games to separate forums.