AFAIK if you bought the game from steam all subsequent micro transactions form that account/client still incur a fee to Valve. The Steam apps are “sandboxed” a

AFAIK if you bought the game from steam all subsequent micro transactions form that account/client still incur a fee to Valve. The Steam apps are “sandboxed” as in you cant run them without Steam, they use their own executable that is tied directly into Steam.