We got ours a few months ago, but we had to buy it there (gave application and check to Stella to turn in). They came in mail about a month afterwards. It is now just a card you keep in your wallet.
And yes, they are probably raising the rates, but then they should IMHO. This is the cheapest scuba park in the country. Look at most of the springs in Texas and Florida... they charge $25 or more per day! Some places even charge that much per dive. Yes, I know we have no control over where the money goes... but I do think it is reasonable to raise the rates for divers.
BUT I do think they MUST start charging for swimmers, also, maybe $5-10pp per day, give them a wrist band.