I go with Virgin Holidays, and IIRC they stipulate that early entry is only valid on one of the first two mornings on your stay. Once you've done it once, you don't get the chance again. And like I said, unless the offer is taken up within your first two mornings, it expires.
And also IIRC, the Virgin Holidays early entry is at 7am and includes an exclusive breakfast in The Three Broomsticks. This does not appeal to me, as a Virgin Holiday Rep is there to meet and greet you while you eat...not my kinda thing. Spider-man maybe, but not a holiday rep. This is Universal Orlando, not Club 18-30.
I don't know if any rides are up and running at 7am, so unless you really want your English breakfast then perhaps just ignore the Virgin Holidays offer, and go for 8am like every other resort guest.