I know that there is a referral scheme for purchases fdirectly from DJI however, is the Rewards Scheme running? If so how do I regsiter products? I've a tone of stuff I need to register.
Thanks.

Just go to the main DJI website and register your products. Or inside the software you downloaded to use like your fight controler I think there's a tab to enter your serial number.  That is how I did mine.

I think the rewards system is for after you purchase from DJI. If you get others to purchase you then start accumulating points. Or any purchases you make after the initial purchase. What I mean is, I don't think the Phantom and the extra battery and accessories I bought with my initial purchase give me points towards rewards. You have to have the barcode established to earn the points.

I agree, even when I purchased an additional battery online afterwards I was not credited any point. So apparently it is only useful if you bring in new customers.