I understand why you cannot add every payment processor, but Authorize.net is a company that Visa paid 2 billion dollars for and has a massive number of clients. When we are designing websites at my company, we always use Authorize.net for people with "real" viable businesses. Most of the applications I use on wordpress for booking software, ecommerce etc always support Authorize.net. Not trying to be rude, but at the same time trying to imply this is an oversight not supporting a payment platform this big. We offer both Authorize.net and Paypal on our forum and many people don't like paypal and use a credit card. Thanks for listening!