Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
As to the refusal to take challenges, I renew my request to do something about keeping the ratings current. No activity for a long period of time should either start degrading the rating, or just eliminating it.