By the way, do such online Tournaments even exist, or are online Tournaments always played on pre-released maps for study? Honestly, I don't consider that a real online experience. It's practically the same as offline, because players first study the map thoroughly in single-player mode. And only then do they put on a show in an online match.

1. Diplomacy is banned in online games in 9 out of 10 cases.
2. Fixed maps (pre-released maps) are much more balanced than random maps, but they lose a bit of their appeal because they are released in advance. However, this is usually just a few days before the start of the Tournament, which doesn't disrupt the balance, as everyone can study them. But even with that, such a Tournament is fundamentally different from offline play, because even after studying the map from all angles, the game is played only once (without replays), and most importantly, you are playing against a person, not computers (with their monotonous behavior) or neutral creatures!