There are a lot of companies that offer expos and talent searches as a way of enticing performers to pay to attend those events. The problem is that those companies are a feeder to other agencies and managers and do not have the ability to actually help you in your career. They are using the names of the other companies to get you to sign up but they have no control over the agencies and managers. There is also no guarantee that any of them will offer to represent you and if they do there is no guarantee that they will promote you to the industry. Stay away because they are expensive and very misleading in their marketing.