After the release of the extreme, at the moment, part of the series, they did not immediately switch to it, but over time, some of the players nevertheless switched to this CS: GO, the skins that were introduced in 2013 in one of the updates also contributed. And since that time, it has become an integral part of the game: the most cases on third-party sites, the exchange and sale of skins on the Steam marketplace itself. Skins have become a kind of currency.