I came to figure out, why would a consumer/customer use Bitcoins?
You have to pay the 3 cent fee, while you dont have to pay anything when paying with a credit card.
So what is really a benefit for using Bitcoins, customer wise?
Credit Cards do indeed charge a fee, although most times this is to the merchant and not directly to the customer, although the merchant certainly passed this fee along to you in the form of higher prices. While you often will not see direct evidence to this as most places will set their price to offset this fee to be spread out to all customers, some place will offer a discount to certain forms of payment.
In my area gas stations are a good example of this concept as cash customers can pay 3-5 cents less per gallon than credit card customers.
Some online vendors do the same with Bitcoin payments, by offering a slightly less price when paying with Bitcoin than with credit cards. One example of this is at a precious metals dealer, where they will usually treat Bitcoin payments the same as cash or bank wire as far as fees are concerned and Credit Card users pay a higher premium.
Here is one such example from Amagi Metals: