https://www.polygon.com/2018/7/31/17634642/steam-item-scams-valve-fix-abstractism

Yesterday, Valve removed indie platformer Abstractism from the Steam store. Though the game was also accused of hacking players’ PCs to mine cryptocurrency, the main reason why it was removed was due to “scamming customers with deceptive in-game items,” according to the company.

Steam users have been more vehemently complaining about Valve’s lax stance on trading items ever since. When users reported fake items, scammers would start to notice and take action to avoid being detected. While many trading community admins tried to contact Valve, there had been no acknowledgement or statement.