One game is a one-time transfer of a map to/from the server, for example:
90 KB for XL+U and 250 KB for G+U (this is for random maps. Custom maps can weigh 1.5 MB or more)
Next comes the exchange of a ridiculous amount of bytes, including global chats.
In general, 2G on a mobile phone in the middle of nowhere handles the lobby.
This is all for a single player.
Honestly, I was very surprised when at the last CIS (I think) event they played not through the lobby to save traffic.
последняя версия - 5.0 RC96 (19.09.2020)
последнее видео: https://www.youtube.com/watch?v=u70wC0DJ7I8
полное подробное описание