That doesn't make sense. Do you not play a lot on lichess or what? 1800 lichess corresponds to about 1300 on chess.com, given the public ranking distributions.
I'm 1800 on lichess as well but much lower on chess.com
oh lol hope to see you again XD
to get knife skins you just need knife kills
I recommend joining 35 hp servers since everyone only has knife. For knife kills to count, there needs to be at least 4 players on a lobby so you cant farm on AFK alt accounts unfortunately.