I'm interested in trying out membership in the USRSA, and I noticed on their web site that they have a 1 month trial membership for only $9.00, which is great. But since I have to give my CC for the trial, does that mean they will automatically enroll me in a full one-year membership if I don't explicitly opt-out? Or is the trial a one-time fee and I must explicitly purchase a 1 year membership if I want it after my trail is over? Also, can any USRSA members comment on why you think it is worth it and what kind of benefit you feel you get from it? I noticed that they send out coupons for sets of strings. Are these coupons for free strings or just for discounts on strings? Any other reasons you feel a membership is worth it?