The Bitbucket customer agreement https://www.atlassian.com/legal/customer-agreement section 7.2 states:
Hosted Services are provided on a subscription basis for a set term specified in your Order (“Subscription Term”).
Then regarding cancellation terms:
Except as otherwise specified in your Order, all subscriptions will automatically renew for periods equal to your initial Subscription Term (and you will be charged at the then-current rates) unless you cancel your subscription through your account at my.atlassian.com.
How do I determine how long my subscription term will be prior to payment? The "Purchase plan" form doesn't give me any details of the "order" I am purchasing.