By bank transfer: the membership is valid for the period paid for (at least 6 months) and ends automatically, without you having to cancel. You will receive a reminder by e-mail in the last week.
By subscription (credit card via Stripe, or PayPal): the membership renews automatically until you cancel. You can cancel at any time under "My remoteChess"; the time already paid for remains yours.
After your membership
You can finish games and tournaments already started at your leisure.
You can become a member again at any time via the payment page.