I have 1,400 hours in CS:GO and I never thought about faking this way until I saw it in FaZe vs G2. Of course you improve a lot by playing on your own but watching professional matches is for sure productive if you make it so!
The point of this video is to prove what has been stated above.
BTW it wasn't a cup it was just a normal match, my bad.
Match demo downloaded from HLTV.
My game recorded by Plays.tv.