My only rule for accepting challenges is that of introduction. If one does not have the time (or courtesy) to give even a quick greeting, I will not accept the challenge. Cheers!
Tournament Entry Rating is calculated by the formula (CurrentRating + HighestRating) / 2. The entry rating will never drop to more than 100 points below your Highest Rating.
Rated stats are updated within 24 hours of the last completed rated game.