Mod chaos next round!
Also prominent Streamers (in this case a german Community Contributor) can be banned for a couple of days by WARGAMING.NET EU for using illegal Mods.
The support will not tell you, which Mod is allowed and which not even if you ask.
The answer you get: “If it is against the rules, it is forbidden!”
These rules are not only the game rules and the EULA, also the terms of WG DPP (third party developers) seems to be mandatory for normal players.