Fortnite - Creator Code - Business Login?

The company "epic games" of the game "fortnite" offer to give you money of their income.

it works like this.

I, who wants to be paid by "epic games" get, if I fulfill certain things, (eg have 1000 followers on youtube and bring Fortnite content)
a code / "creator code".

this code can enter my audience / fans in the fortnite ingame shop and every time you then buy a skin for zb.10 euro, I get a "small" part of it.

do i have to register for a trade?

https://www.epicgames.com/...ew?lang=de

Yes, if there's an intention to make a profit. Otherwise it would be a hobby.