Although we support a variety of payment processors that sellers can use to accept checkout payments, we only accept subscription payments for our service that are processed through PayPal -- whether sent from your PayPal account or just using a credit card that we authorize through PayPal's site, and whether paid month-to-month or a year in advance -- because that has covered nearly every circumstance, and that's what our system has been programmed to handle so far.
"Necessity is the mother of invention," and thus far there has simply been no need for us to invest in maintaining an account of our own with any other payment processor, nor in programming modifications into our account-management system just to handle a handful of exceptions. With over 9200+ subscribers currently paying to use our services, we simply cannot make custom exceptions for everyone who would prefer to have one, when either of the options we accept should cover every actual need, if not necessarily every want or preference.
If you don't want us to authorize your own credit card numbers through PayPal for an annual deposit payment, you can get a disposable Visa/MasterCard gift card and use that instead, or obtain a single-use "virtual card number" from your regular card issuer. You can still upgrade your subscription level on an annual-deposit plan anytime, upon request; we'll just send you a payment link to make up the prorated difference using the larger plan for the remainder of your prepaid year.