It's a basic marketing tool. They know, recognize and encourage people who are not planning to buy to come. It helps them make their numbers. If they get the occasional bonus of being able to persuade someone into a sale, all the better. Most people can't stand the hassle for a couple of tickets. I don't think it is dishonest at all. If the only ones who came were people who were planning on buying, they wouldn't be salespeople, they would be order takers.