So it's those individual keys that require someone with a 580 to activate? Seems kind of odd because how would Steam and U-Play check if you had the right hardware?
You make a rewards account with AMD (use a trash email/pass; see below) , log into that and redeem your rewards card. Pick the two games (if it's a 2/3 card) and, when it's close to release date, it will give you the Steam keys. Valve/Ubi don't check your hardware, AMD does when you redeem the card.
The Steam keys you can keep/redeem/sell and then I guess you could sell the AMD rewards account (you need a new one each time anyway) to someone to link for Division 2 if you weren't keeping it for yourself. You'd want to get the Steam keys off it first for the obvious reasons.