Thoughs on the new battle royale mode, "Danger Zone"? (Also, F2P)

As you all probably know by now, CS:GO got its first big update in a while and it brings a completely new Battle Royale mode and also the game is now F2P.
What are your thoughts on it?
Is it gonna be bigger than Fortnite? Bigger than COD BO4? Which one is the best and why?
Do you think CS:GO is dying and Valve made it free to play just because Fortnite takes all the fame these days?