Correct- it is 0.15% on credit card transactions, or a flat $0.005 per debit card transaction. Stripe (which charges 2.9% + $0.30) is willing to eat this fee,

Correct- it is 0.15% on credit card transactions, or a flat $0.005 per debit card transaction. Stripe (which charges 2.9% + $0.30) is willing to eat this fee, presumably because of the benefits of vastly lower fraudulent transactions and chargebacks.