Your instinct is correct. I actually wanted to see how this type of business works because I was doing research for a book. I went through with the program.
Holiday Travel of America end up telling you that the dates you chose were not available. and any other dates you want to book is also not available. They will postpone the trip over and over again. Until the expiration date. They will tell you, it's ok if you call back after expiration date, we will still book you. So, you call back then, they will suddenly say it has expired and they never promised to book you after expiration date. What??!!! you wonder. I don't have hearing problems. I know what you told me earlier. Basically, you have been lied to. They will deny everything they ever said to you. And they will say anything to get away with the free trip.