SkinArena – JACKPOT | COINFLIP | GIVEAWAYS | TRUSTED
Basically skinarena.com is a 3rd party service. By uploading CS:GO items to the pot you are participating in a game. The more valuable uploaded items are the higher are your chances to win.
You can imagine this like that: one ticket is equal to 0.01. By uploading an item worth for e.g. 5.23 you are getting 523 tickets, and your item is added to the pot. More tickets you have – the higher are chances to have the lucky one.