I would also prefer a power-user-subscription-direct-debit and a banking-feed-subscription-direct debit. I think a lot of your customers could avoid a bit of trouble with this payment method. QFMathew in that article you said something about to “discuss another payment method”. What do you mean?
The other payment method is a bank transfer. Card payment is the preferred method as this is automated, whereas bank transfers have to be manually confirmed by our billing department before the subscription is activated.