I went to a vacation club presentation for a bunch of free stuff once, it wasn't worth it. But its crazy the things they push onto you. They make up numbers on how expensive vacations are to pressure people into thinking they have a deal. Then they try and sell a huge package ($50k+) and to push people into a 20%+ APR loan. Then if you do sign, they stick monthly fees on top of it in perpetuity.
Its a bad idea, but I could see how people that don't have a sharp eye and a mathematical maturity might fall for it.