IMHO, the reasons are: - setting up and uploading tournament rules is not as simple and intuitive as it could/should be - one does not know if tournament rules exist for the chosen tournament. After checking the third tournament, just to discover this one, too, has no rules posted, motivation to look for rules on the fourth tourney has gone - so, people don't read the rules because they do not expect to find (updated) rules, and hosts do not post or update the rules because nobody is reading them