In your opinion, is the practice of requiring a credit card for a reservation considered reservation?

NO, According to me practice for requiring a credit card is not known as reservation.

Explanation:

The reasons for the same can be : -

1. Defaulter - There can be a possibility that the person is involved in malpractice and turns out to be a defaulter hence the credit card practice should not be implemented.

2. Doubtful Debt - If things are given in credit there is no assurance that person would return and give the payment. Hence, immediate payment should be kept in priority.

3. Working Capital Cost - There would in increase in the operating cost of the Business if credit facility is available to the customers.