If you want FREE CsGo skins, you can go to theses sites and get the free credits that allows you to withdraw it as skins

csgocircle. com (Code: Mexiz $0.50)
society. gg (Code: Mexiz $0.20)
csgostrong. com (Code: Mexiz $1)
csgocasino. net (Code: Mexiz322 $0.25)
csgobrawl. com (Code: Mexiz $0.30)
csgoatse. com (Code: Mexiz322 $1)
csgofirewheel. com (Code: Mexiz $0.50)
ruletka.skinsproject .pl (Code: Mexiz $1)
csgopot. com (Code: Mexiz $1)
bets .gg (Code: Mexiz $1)
csgocosmos. com (Code 134096 $1)
csgoburn. com (Code: Mexiz $1)
csgopolygon. com (Code: Mexiz $1)