"Authorization" fees are junk fees that increase the profit margin of the processor. So if they gave you a super low rate, they may have hidden some language allowing them to charge an inscrutable quantity of authorization fees.

Typically, a processor will mark-up the transaction fee a certain amount and that fee is paid for every transaction plus a few for refunds, authorizations, etc. For the typical swipe or internet transaction there should be only one fee. So multiple fees on the same transaction suggests that a processor has built in some way of collecting additional fees into your pricing. This is a very sketchy way of pricing, but unfortunately many processors do this.

Which is one more reason to go with a reputable company that clearly states a lack of hidden fees or complex surcharges. Only a few processors will offer Costplus pricing to anybody. Send me a message and I will tell you more.