The situation with tournaments is completely different. To reach the prizes in a more or less decent tournament, you need skill first and foremost, and everything else comes second. That is, there are few games, but the opponents are usually worthy, and the motivation is incomparable to training seasonal games.
I am convinced that the rating should be unified for one resource, regardless of the type of game. It is pointless to consider games from all resources. Firstly, it is unclear which sites should be considered. Secondly, it is not interesting to write reports on several sites. Thirdly, resources have their own fans and are competitive.
In theory, it would be possible to compete for the title of season champion. But personally, I don't play nearly as much compared to workaholics like explosive. Plus, I try to play with strong players, so I won't be able to achieve such a nearly perfect statistic in principle.