Just some thoughts from an amateur skier.
I've never heard of the AWSA until I saw this thread. Even when I googled AWSA, multiple other sites come up before I get the connection to USAwaterski.org. This is not good. Even though I had guessed the acronym prior to looking, you have a bad search presence. This needs to be corrected in the day and age.
What's in it for me if I become a member? Sure, I want to support the sport, but why would an amateur skier want to join each year? I don't see any list of benefits for my membership that would entice someone learning the course. I'm the sort of new member you should be courting if you want to grow and expand your membership rolls.