Hi Paulo,
Yes, that is what I meant. I think that we achieved, in our tournaments, to find a good balance between the maximum number of challenges and the total time to play (time to accept the challenge + time to play). If you increase the number of challenges, you also need to increase the time to play, because the players need to plan their tennis games with the professional and family life. But you cannot increase it to much, because then you get confusion - you might have a game happening a lot of time after the challenge.
This is why I find this change introduced by Trevor too simplistic.
We have discussed this subject between ourselves and reached the conclusion that our initial suggestions are better:
1. Loser has an "idle time" after a game
The idea is to have some time during which the loser remains "idle" for X days, after finishing a game. The goal is that this player is available for being challenged during these X days, thus allowing other players to challenge him. The winner does not have this "idle time", as a benefit for winning the game. This solution will allow more chances for lower ranking players to find challenge opportunities.
2. Not able to challenge too many times
In this case, the idea is simple. If a player challenges more than Y times, he has to wait for a period of Z days to be able to challenge again. For example, a player that has played 3 games, him being always the challenger, he has to wait 5 days before being allowed to perform a new challenge. Of course, during this period of 5 days, it is likely that he will be challenged by a lower ranking player.