I don't think that's been true for a while - just tested it with For Gold and Glory ($0.00) and I didn't have to enter any payment information, beit credit card or paypall. It just moves you on to the next step, fulfillment.
Wait, I just reread your response. I think you're mistaking an objection about going through the process of completing an order with having to go through that process and entering in cc/pp information for absolutely no reason.
Some have a problem with the former, as I understand doing a few steps to associate the item with your account; my objection is the latter as I'm not providing my payment methods unless I'm actually spending money and having to do so seems seedy.