The CAC conference has an admission price and the sponsor programs, which there are quite a few, receive a certain number of free passes to give to their best affiliates and/or whoever they choose. If you are a good producer, often you can also get the program to pay for your flight and hotel stay.
The Spring Break conference is a free admission conference, you just have to worry about travel / hotel. If you are a big enough producer and ask for a program to fly you to Miami and put you up, you probably have a chance of receiving something.
BTW, this is all stuff I have researched, not from the perspective of a super affiliate, because I am not. Also, the CAP spring Break is well worth the cost of flight and hotel. You will get much more out of the networking and learning opportunities than any cost involved.