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.
In some rating charts the ratings fluctuate heavilly. The top player one week can become 10th or worst in the next... So, would there really be a point in forcing the top player to accept invitations? By the time that game was over, the results of forced games could have changed his rating drastically and the outcome be almost meaningless...