Part of the reason my first answer to this question didn't include many specific is we(ET) don't like to state(in public) specific details on the financial side of town.
Not that we view the meta-game as a hostile situation, we actually try and cooperate with as many towns as possible. The reason is, if we give specific number of details on our strategy, we give information to other towns that they might use to their advantage and our disadvantage. This is terms of market prices and trading situations. Also some of the market strategies we have adopted would be less useful if other towns adopted them also

Furthermore, the details of the met-game do change from time to time. Back in september for example, the resource allocation between the host town and town of the players changed from 50:50 to 75:25(in favor of the players towns). This single change greatly deduced the benefit to the town the hosted the game.
As Paradox stated, we also do not have a great need for game rooms. Other than the stadium, we have built very few in recent months. If we wanted to, we could build more, we just don't have a need.
One of the reasons that we rejected the idea of a "2nd ET" was if we magically had 13 more game rooms, what games would be build?
As I see the needs, the only gamerooms that would be of any benefit to us are:
Bohn Duell and Manitou, which we don't have and would probably be of minor benefit to us.
Metro and Cafe Intl, which we don't have and would probably be of great benefit.
Attika and Alhambra , which we have but only in people's houses. Building these would free up a w15 to be able to change their game to a new one in the future.
TA, we lost 1 of our 2 rooms when Mahjong left. A 2nd TA room would be of some benefit.
Can't Stop. Since this is a quick game and is very popular, a 2nd room would be useful.
That makes 8 possible useful game rooms. We have 7 rooms pending(6 in the stadium and 1 form either Ren or Redeye I forgot which hasn't put a game in their house. Then we have the w14s, we should be adding approx 1-2 new w15s a month for the next 5 or 6 months.
So as paradox said, we really have no shortage of game rooms.