No, I said it uses a vdeg multiplier. Meaning that the FOV value you set in the game is a multiplier for the actual vertical FOV you get. The devs did this to (in a very clunky way) try to get "close" to CSGO in terms of FOV value.
I think their thought process was that CSGO uses a 4:3 based FOV, so if we multiply the vertical FOV by 3/4 we get the same thing... Which is not correct. But it's what the game uses. So if you set a FOV of 100 in-game, what you actually get is 100*0.75 which is 75 vdeg.