Just to clarify--as there is also the same confusion on the Note 10.1 forums.
There are 2 'registration' site pages for samsung devices.
One is the traditional registration page. The one where you get a thank you 50% off accessory email. They've had this site/page for years.
With the release of the 10.1 2014. They had a Samsung perk page, where if you enter in your serial number/create a samsung hub account, they will send you all the perks ($25 play credit, $50 samsung hub credit, and various trials) That's not a registration page per se. It is completely independent of the original registration page, it's just a bonus--if you will.
I guess someone figured out that if you go to the Note 10.1 2014 page, and enter in other Samsung devices, you'll get the same perks as well. Probably an error on Samsung's part.