One important thing to note is that it’s extremely unlikely that the codes you can redeem will be for Fortnite free V-bucks. This is because the codes for V-bucks are entered via a different method.

If you select Xbox, you'll get a 25-digit code that you must enter ... use it between those platforms. Only V-Bucks specifically purchased on the Nintendo Switch can be used on the Nintendo ...

So whether you want to give V-bucks or something else ... Xbox One, Pc and Nintendo Switch. Like most every other free-to-play game, players buy cosmetic items to spruce up their characters ...