You can send your fish to shows, buy sell and trade stuff, get quality fish for less than you would on AB (live auctions), and be provided excellent info from the handbook or FLARE magazine. It's well worth the $20 or so for a year.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.