I would think so.  I got my C7 Pro discount after I bought the issue that had C6 Pro on it and it had a regular serial number.

Quote - Question....   Owners of Carrara 7 get a discount from Daz towards a purchase of C8...  and they have the registration key on their account to prove their ownership...  Do owners of C7 by way of 3D magazine have the same advantage to purchasing C8 at those discounts..?