I don't know what Priority Club is up to now. A friend of mine just called to tell me his account was closed for improper activity.
Since the only activity he has had for the past month is this contest, it has to be related to that. He said that he won 5,000 points one day the first week, 15,000 points that same week and nothing since and that he never got above the low 40,000s on any day. The only thing "against" him is that he is in the UK where an extremely high number of winners appear to reside.
If they are taking that approach the problems are obvious. If they are looking for duplicate accounts, anyone who is cleaver is going to set them up at relatives addresses out of State rather than at their own address. Multiple similiar names in the same State probaly means a large family. If the duplicate accounts are spread over several addresses in several states, it would be impossible to find.
These contests are never perfect. What about the one a few months ago where the answers were being discussed and agreed upon within 10 minutes of the photo being posted? In that contest Priority Club probably did not expect an unlimited number of people coming up with the correct answer after working together on this board. This resulted in (I would guess) a lot more points being given away than they planned.
The issue this time is that Priority Club limited their exposure. They knew exactly how many points they were going to give away before the contest began, so it's now player vs player, not player vs the game. For some that results in a different social dynamic.
Then, of course, PC really messed up by using a company that fails to understand the most basic levels of internet security. All in all a good contest in concept, but poorly executed.
Priority Club clearly runs the best contests and promotions, but they really need to have them vetted before bringing them live.