indeed. my credit card requires me to preload money from my bank account. it's like there is a second account that keeps a balance that i can spend using the credit card. whenever i use it, the balance is updated. how the credit is paid off i don't know. it could be either right away, or the amount is just hidden by my bank until it is time to pay off at the end of the month. either way, the credit limit is zero. so i can never spend more than i put in first. (though this may be based on how much i spend or be a configurable value.)
So, your credit card is in practice a debit card?
that is not a credit card :)
There is a point though - Mastercard and Visa treats them as "prepaid" credit cards, which are different from both true prepaid cards (as issued in the US), charge cards, and true debit cards (former Maestro and Visa Electron). Again, different regions have different lines for this, especially in Europe.
IIRC, bunq in the Netherlands issues Mastercard "credit cards" (with no "debit" annotation as on true Mastercard debit cards). They're treated as credit cards for Mastercard purposes but are backed by deposits.