Its already been done for you. John has stated he can't suspend the service on his end so he has to end it completely and start all over again for next season. FYI it ended on Tuesday/Wednesday this past week.
XTEAM...John provided an update in his journal today, turns out each account has to be canceled individually. I just did mine, sign in then click on dashboard and once there it will show a link to cancel subscription. Very simple.