PayPal is the only method we accept for the reasons already given - plus, you can cancel whenever you want without having to wait for us to arrange anything. We don't see any banking details, personal info or credit card infomation at any point with PayPal and the subscription remains completely in your hands and not ours.
Money should leave your PayPal account at the end of the subscription month (so if you subscribe, say, 25th May then the next deduction would be 25th June and so on). If you wish to cancel at any time, you can do so by going to PayPal and closing it via your account. The staff here have zero control over your payments although if PayPal should screw up and charge you, say, three times or something for one subscription, we are able to issue a refund accordingly. Other than that, it's all under your control