The first time I won from them was in May and then I just won again in August. I ended up paying $15 Paypal for them to send me my trip package info and a few other offers. When I received everything in the mail, I think they wanted another $20 on a credit card. Of course then I figured the whole thing was a total scam so I figured I would just cut my losses at $15 and forget about it. I still have the info they sent me.
When they sent me the next email saying I won in August, I decided to send them one back, telling them how much of scammers they were and that I would warn anyone else I knew not to enter or pay any money to them. They promptly sent a message back telling me that I should have read their contest rules more closely. It actually does have in their rules that they have a charge to send the package. They also went on to explain that they do not scam anyone and that many of their winners have been very happy with them, but if I wanted to return the paperwork I could do so and get a refund.
I have a year to take the trip if I want and pay the extra money they wanted on a card. I just don't know if I want to take the chance or not. Hope this helps you anyways.