You would be amazed at the money that showcases and camps pay coaches, especially HC's, to be at events. There is a tiered system with many of them. When you show up, sometimes they will ask you what schools you are interested in or where did you get the information from. That goes directly back to the coaches. I know some will have the organization or school in the email list so they know they sent them out. Some are required to send the invite to a certain amount of schools. Coaches make good money just going to showcases and camps to sit in the stands or in the booths.