[quote name='pk24']sadly, i was only given one code

. 4 seperate emails, all with different ip's. I think they match their emails with the ip's and just don't give them out to those with repeat ip addresses.[/QUOTE]
Not true. I know several people that won multiple times with entries from the same IP.
Plus due to the fact that many businesses, apartment complexes, dorms, schools, cyber-cafes, etc, all use NAT to map their many, many users to a single internet IP, it would not make sense to allow only one entry per IP. A promotion like this would probably get a few submissions from different people using the same IP (schools, dorms, etc)... However, submitting many, many entries from the same address would be suspect.
It is much more likely that they used other means to detect multiple entries.
I can't believe that ANY promotion still falls for the dot or plus trick, both of which widely known and are easily detected. From what I have heard, no one that tried the dot tick with this promotion won anything, even though some submitted hundreds or thousands of variations. Actually, I found it suspect that I didn't win on any of my 'free' email accounts, although I won a few on non-free accounts. Coincidence? I don't think so...