As @Peresagruska points out, the rules don’t say anything about registering with separate alts. It just says that each character only gets 1 ticket. And considering how much of Eve is tailored towards the Altaholics out there (Cyno alts, Scout alts, Market alts, heck even the Launcher facilitates multiple Omega accts firing at once) I don’t see why you’re so bent out of shape over people registering with alts.
It only makes sense to register with several alts to improve the chances of winning. Just like it only makes sense to shoot a target many times with many bullets in the hopes of wrecking them.
Now… if @BIG_Games wants to limit people from using Alts in the future, that’s perfectly understandable. And since there is an API call involved in registering, I can’t imagine it would be “too” difficult to limit one character per Acct. But that hasn’t been a rule thus far. And that still wouldn’t prevent people from using several Accts, unless you’re also logging IPs which would just ruin households or coffee shops from participating.