Computer games have long ceased to be something inconsequential. Today it is one of the most profitable industries in the world. However, very often the money is brought not by the games themselves, but by additional paid content in them. There is no need to go far for an example. CS GO glock 18 (water) - paid skin for the famous gun. Simply put, changing the appearance of a game weapon.
Skins
In the world famous game CS GO there are so many skins that you can ruin any player. Skins are from cheap to those that stand like a car or a summer cottage with a warm stone house near Syzran. Glock 18 (watermark) is a cheap skin. It costs only about 1100 rubles. What is it for? To please the eye. This is its only use. Skins do not give anything. The player does not begin to better understand the mechanics of the game or more accurately shoot. Having paid more than a thousand rubles, the user receives a regular picture.

Most of all skins are cheap and unremarkable. However, there are those that are very expensive. Glock 18 (water) is the most common skin. Yes, it costs more than the project itself. Having received it as a gift or winning, you can thereby pay back the game. However, you can not withdraw money from Steam. They can be spent on other games or try your luck at roulette. If you are lucky, you can win a much more expensive skin or lose if you are not lucky. Of course, winning an expensive skin is almost impossible.
Glock 18 (water) is a regular glock. The trunk is painted pink, and a splash of blue water has been applied to it. The skin cannot be called beautiful, it is much worse than the Gradient skin, which costs 7 thousand more.
Exchange contract
An exchange contract is the most effective way to exchange many expensive and beautiful skins for one, but cheap and bad. The loss of what is really needed is never equal to 100 percent. In practice, it is not easier to get the necessary thing in the exchange contract than in roulette.
How to craft Glock 18 (watermark)? Very simple. It will take 10 PP 19 "Bison" in a state of "directly from the factory." Will it work out? Of course not, if the player is a loser!