Valve don’t even make the skins featured in cases or maps in the operations.
Sources:
CS:GO - Problem with ladders on de_train (0:09)
de_train Ladder Fix (0:13)
Building the Content that Drives the Counter-Strike: Global Offensive Economy
Freakazoid Reaction to R8 Revolver and CSGO Patch
n0thing Rants: CSGO Up