But negotiating only for higher wages per hour and lower hours as a package deal could make it harder to get either. It probably depends employer to employer, but doing both at the same time would be hard to make them do.
Credit card companies require making at least the minimum payment every month in order to be on time. Usually this is the larger of a fixed amount (e.g. $50) and a percentage of the amount owed on the card (e.g. 1% + interest). If you make at least the minimum payment each month, your card will report to the credit bureaus that you paid your bill on time, which will help your credit score.
Does this apply even if you’ve purchased less than the minimum payment? Is there a penalty for buying nothing with a card for several months?