In my pre-insurance days, I worked a lot of trade shows, as a draw, and as an exhibitor. My feeling is that when you collect a list of names by offering a prize, you only have a list of attendees. It doesn't mean that any of these people are interested in what you're selling. If your prize is directed towards insurance, (free revue, etc. ((that 'etc.' means that I can't think of anything else))), you'll have a qualified lead. I think that you're better off buying a list of qualified prospects, and spend Sunday with your family.