I was at some festival where they had a raffle like this, thinking it was harmless, I put in my name and number. A week later I get a call that I have won a vac

I was at some festival where they had a raffle like this, thinking it was harmless, I put in my name and number. A week later I get a call that I have won a vacation but I need to come and attend their seminar. It was some sort of buy timeshares which work across multiple properties around the world. Total cost was $10-15K but you can make low monthly payments. After the loan is paid off, you can stay for free during your vacations. I did some rough calculations and thought it was worth it. But when I asked for better pictures or addresses of their properties, they could not provide it. They were getting frustrated and kept saying why you care what your room looks like, who stays in their room on a vacation, etc. After their refusal to give any such info, I left but there were other people who were signing up. Later, I learned that these are indeed scams, and I got lucky that I didn't sign up with them. Their properties might be run down, and the company might fold after a few years and you will lose access access to "their" vacation properties. To their credit, they did give me a a gift certificate for low end hotels chain.