Why? LDLC used the same boost, but a slightly worse one. Fnatic took it to the next level. Although, I agree that they should remove it, it is way to overpowered, but it's genius use of game mechanics.
LDLC did not use the same boost as far i look at their gameplay, even the commentator said it should not be there..
But the commentator just said "Smart use of game mechanics".. ye that true since it is not an exploit or an not allowed boost.
Well, the expect an hotfix soon from CS:GO dev team haha.
The problem, as commentator mention with this boost is that you have view all over the map.
If they go A or B. It was nasty gameplay, really. I did not like it at all. But yeah, it is allowed