Payment systems
Flame cases let you buy cool CS: GO cases, to win fresh new skins. There is also a daily free case, and giveaways. The website also follows a Suicide squad theme.
Mvpskins.comUse csgoroute for 1 free case, and 1$ reward on first deposit 
Datdrop.comUse top100-list for +5% to deposit 
88skins.comUse ABJBG code and receive free 3.00GB 
FarmskinsUse csgoroute for free credits 
HellcaseUse csgoroute for $0,3 free balance 
CaseshotUse bonus171457 for $0,3 free balance 
CSGOLiveUse csgoroute for free 0.5$ credits 
skins2day.comUse ABJBG for free coins