Rules for Heroes of Might and Magic III online tournaments on HeroesWorld.

Many tournaments is also a negative. It's not just about the participants who drop out, but also about the fact that tournaments lose participants due to competition.

Well, if a participant leaves because of another tournament, that's a good thing! It means the quality of the tournaments is improving in terms of interest for people. This is the only way to achieve the best tournaments. Because if your idea were in effect, the second tournament wouldn't have opened, and the player wouldn't have had the opportunity to participate in a better one.