I'm a subscriber and I didn't know you could do that! However, as most of the playalongs are way too fast for me I have used Audacity to slow them down and I then playalong after printing off the sheet music.
I am very happy if I can play the basic tune - the improvisations are way beyond my level.
The subscription is excellent value for the music you can then access, both mp3s and print outs. New tunes are constantly being added and once you've paid, that's it!
I'd be interested in others' experiences.