Subscriptions are part of a MFCA membership, which is $55 for one year. For that amount you get full membership, which includes 4 hard copy issues of The Tweak, membership card, membership packet, and everything that goes with membership such as unlimited access to the MFCA forum.
For $20 you can get full membership and a PDF version of the magazine. To join you just need to go to
www.miniaturefootball.org and find the membership link and follow the instructions.
Individual issues go for $7 an issue, plus shipping and handling, which I think is $1.50, could be $2 (postage was just recently increased). If you are interested in singe issues, then I suggest you pm "Weirdwolf" and he will take care of you.
Hope that answers your questions.