My DDJ-800 arrived without a license card

Hello, I'm here to ask you about my situation. I bought a Pioneer DDJ-800 controller, and everything came in perfect condition except that the license card wasn´t in the box. 
I checked with the store where I bought it and I'm waiting for their response.

My question is how necessary is it to have the license card if, from what I've been reading, Recordbox 6 and 7 apparently no longer use it. Is this really the case?
Why else would I need to have the license code?
I'm a bit new to the Pioneer world and I don't quite understand how licenses work and what the difference is between the one that comes on the card with the purchase of the controller and the download versions.