When you first purchase the unlimited membership package, you will pay the joining fee plus the monthly rate. On the date of your sign up, the monthly rate will draft from the account of the card on file. There is no commitment - you can cancel anytime. 
With your membership, you also have access to the "don't go... glo! program"! Place your membership on hold and pay $10 a month in place of your normal monthly rate each inactive month. The best part about this? You will get $5 of your hold payments back on your account as In-Store Account money that you are able to redeem on anything in-store other than your monthly rate or gift cards.