So assuming the rest is all the same, you just paid exactly what you would've paid with a debit card. Because the merchant had to raise prices to accommodate the fee. And that's with the credit card company not taking a cut and we all know that's not true.
There are merchants that do not do this, such as Target, which charges 5% to use a credit card. Insurers/tutors/daycares/schools/healthcare providers/contractors/gas stations/restaurants/governments/utilities are also known to frequently charge more for credit card payments.
Any seller can choose to offer a lower price for debit card / ACH / Zelle payments if they want to.
High tier cards are more expensive to accept, unless your merchant rate is a high enough flat rate that it covers the average and then some.