It looks like yesod already figured it out, but for anyone who doesn't already know you can manage your PayPal subscriptions at https://www.paypal.com/myaccount/autopay/ If you cancel it through there it won't automatically try to bill you anymore, but your VPS will stay active until your payment runs out. We have had quite a few people ask for pay-as-you-go billing for VPS so you can just pay with one-time payments instead of setting up a subscription. This is something we will implement eventually, but like most things there is no exact ETA for it.