This is a spin off of a nectar competition, but it doesn't appear to be any sort of requirement that you have a nectar card.
The 8 DVD Rental Package (the "Package") entitles you to 8 free DVD rentals at blockbuster.co.uk.
You must sign up to the Package by 31 December 2006 and the 8 DVDs must be rented within one month of signing up to the Package.
The Package is subject to our standard Rental DVD Subscription Service Terms and Conditions - Click on the link below.
You must be 18 years or over and have a valid credit/debit card to sign up to the Package.
The Package is only valid for new subscribers.
The Package cannot be used in conjunction with any other offer.
We will automatically transfer you to our standard 3 DVD Unlimited Package (for the regular monthly fee of £14.99) if:
(a) you do not cancel your Package before the expiry of the one month period (in which case the first monthly fee will be charged on the day that the one month period expires);
(b) you rent more than 8 DVDs (in which case the first monthly fee will be charged on the day of your 9th rent).
However, it also originally said that expired subscribers could avail of it too, so long as their account had expired more than a few months ago (sorry so vague, the T&C changed while I was on holiday!)