It was only a matter of time before Valve did something about all that, and last week, it has.
If it's not YouTubers scamming their viewers and endorsing gambling sites, it's regular players whose livelihood relies on trading skins on third-party sites. Skin trading and the economy around it are big parts of Counter-Strike: Global Offensive for many players.
Last week, Counter-Strike: Global Offensive received an update that came with a massive change to skin trading.