Ethnio offers lower rates based on certain incentive volume thresholds.
A few different variables can help us lower your rates, and paying for incentives via credit card is the most expensive, because we have to pay fees to process the payments. That is 8% for any credit card transaction. The minimum invoice request amount, which is $5,000 drops the processing rate to 6%, and it can go down to 0% for larger volume spending per year and certain Enterprise plans.
You can always see the processing fees listed when you place your incentive order: