I didn't click the link, but I'm almost certain this is a scam. Here's how it works: you fill out a card somewhere - at the mall trying to win the free car, at the zoo trying to win a vacation to San Diego, at a bridal show, so on and so forth - and then you get a call from an agency that wants to give you a free vacation to somewhere cool - like Vegas, for instance. All they want you to do is come in for a "brief promotional presentation" - this is so that they can "try out different advertisements" on a "wide variety of clientele." Then they mention that you'll need to bring with you a credit card. If you ask why, they'll say something like, "Oh, we just need to verify your residence/identity/something" or "We need to just put a $50 deposit on your plane tickets to reserve your seats." Of course, all of this is complete bullshit. In actuality, it's a classic foot-in-the-door technique: they keep getting you to acquiesce (e.g., first you take their phone call, then you agree to meet, then you agree to fork over the $50) until they take you for what they really want, which is, of course, money.
Cliffs: Yes, it's too good to be true. In fact, it's a scam, in all probability.