authorize.net was bought a few years back and there has been few changes to it. Some of the original developers on the authorize.net team have started mtrex. It

authorize.net was bought a few years back and there has been few changes to it. Some of the original developers on the authorize.net team have started mtrex. It is a similar service, but things seem to fit together better. I guess the second time around they know what they are doing.