Its been more than a week but still less than half, maybe they need to consider to do your suggestion because it may take more week(s) to get all 100 responses.
The survey hasn't received 50 responses yet as BCgame team has made the announcement in the games and rounds. To be frank, the games and rounds board doesn’t get enough attention from the Bitcointalk community as it used to get before. This is in exclusive giveaway for Bitcointalk forum members, and it won't be possible for anyone to give the survey answers properly without having the gambling experience in BCgame. The survey hasn't reached to the desired number of entries for these reasons. Therefore, it may really take more weeks to get the desired number of responses.
You said exactly what I as going to say, I completely agree with all you have said, the games and round board is one of the most isolated board on this forum, and this i personally believe it's because almost every single signature campaign manager does not accept or count post on that board as a payable post, this I believe is the major reason why that part of this forum have become so very isolated.
If they bc.game team had posted the survey, maybe on this board, or maybe even here on their ann, i believe that by now, they would have gotten the number of responses they need.