You should always keep in mind that the credit card supplier is in this to make a profit. They are not your friend. So when they make you an offer then they are doing that because they expect to benefit from it. It may not be the best thing for you.
So what should you do? Read the small print. Find out what you are required and expected to do and what you get in exchange.
Keep in mind that if something seems to good to be true then it probably is and there will be a price to pay. There is a limited amount of profit to be made from you and the credit card company can decide what proportion of that profit they will use to entice you into taking up their offer.
They may offer reduced interest rates or cash or points as refunds for you using the card. Look carefully at the offers available to you and ensure that what you get is what you want and that it suits you and your financial lifestyle.
There is no, "One Size Fits All" in the financial world so make sure you get the product that fits you.
Read the small print. Any card that offers something that others don't may well be cutting back in other ways. The only way to be sure is to read and understand the small print.
Before you can get out of Prison you must recognise that you are locked inside. - Anon