Although skin gambling in Counter-Strike: Global Offensive has been around for a number of years, last year saw Valve crack down on a series of sites—issuing cease and desist orders to several gambling outlets for using their Steam account for commercial purposes. Valve is now turning its head towards its other major online shooter, Team Fortress 2.
If you're unfamiliar with how skin gambling works, Evan's detailed overview in relation to CS:GO is worth checking out as it's a similar process in TF2. At this stage, Valve hasn't revealed its next move beyond stating its intentions.
As featured on the Team Fortress 2 website, Valve released the following statement:
"In July of last year we outlined our position on gambling web sites, specifically noting that Valve has no business relationship with these sites. At that time we also began blocking many CSGO gambling accounts. You can view the original post here.
"More recently, some gambling web sites started leveraging TF2 items. Today we began the process of blocking TF2 gambling accounts as well. We recommend you don’t trade with these sites."
Following last year's crackdown, a number of shuttered CS:GO gambling sites suggested the way in which they operated was entirely legal, and that they'd relaunch following talks with Valve. A cursory Google search would suggest this has not been the case, which of course sends a pretty clear message to those still operating under the radar.