I yesterday ran in the same issue. A player joined a tournament as 11th pair, by renting a robot, just to be able to join the tournament. During the game I tried to replace this robot by a real player, which did not succeed, very probably because the robot was not a TD-added "sub", but a player-rented "paid" robot. I agree that the person who rented the robot should be asked by the TD first, but generally I think a TD should be permitted to replace even a paid robot by a real player. Also (or alternatively?), it would be great if a TD could enable to automatically join one single player sitting at the partnership desk with a robot partner sub, even if that should lead to an odd number of players (more than one players at the partnership desk should be able to merge into a partnership themselves).
