Wargaming’s EULA has recently been changed and the mod banlist has been updated to accomodate to the increasing amount of “cheat” mods being used in the battlefield. Anyone who are using any such prohibited modifications will get their account locked for a week, and if such transgression is repeated, permanently frozen, so consider yourself warned as the next banwave is coming live very very soon after patch 1.5.1 hits the live servers.
Furthermore, most likely owing to recent drama with a certain russian Youtuber breaking Sandbox server license and sharing their account with third parties, account sharing is forbidden in any form.
Have fun and play fair, tankers!
P.S <3 eekeeboo