True, but my debit card offers me the same thing without using credit. Just pay right out of my account. I use credit card for emergencies only, and so far I haven't had to use one at all thanks to saving money for a rainy day. 

That is exactly what I said. 

Two reasons to use credit cards even if you pay it off right away:

1. Builds up your credit rating.  If you never use credit cards, you will run into problems when looking to do things like getting a car loan or a mortgage.

2. The rewards. Are you sure you get exactly the same points? It doesn't say in the article, but if this is a rewards card, there's a very good chance that you will get considerably more points using the credit card than you would normally get using cash as a member.  That's how many other rewards cards work.  If not, then it's a pretty shitty card and not worth your time. But I have a feeling the card will net you more points per purchase.

Credit cards generally have 21 days of grace period where it's interest free.  If you pay off your purchases within that timeframe, you get ALL the benefits of using the card, and none of the negatives. Your credit rating benefits, and you get any extra Gamestop points from using the card. I make 95% of my purchases with my travel American Express.  I pay them off immediately, or at least within the 21 days.  I have never incurred a cent of interest on that card, but I have enough points right now to fly for free to most places in Canada. And many places in the States.

I do not "need" a credit card really.  I use them for personal and business expenses for the reward miles I accumulate.   Makes taking a vacation much cheaper when the flight is just the taxes.

Credit cards are not for everyone, but if you have discipline and full understanding of your personal finances they can offer some nice perks.

The Playstation credit card is way way better than this. I get so much free stuff it's ridiculous, and they have never made a cent off me in interest. Hot shots Golf Vita, GTA5 PS3, a 4GB Vita card, a Vita game case, a year of PS+, at least $160 in PS store credit, an avatar pack, in about 2 years.

/EDIT Oh yeah 2K14 PS4 and Transistor PS4 also.

The super-high rate is probably to offset the fact that all powerup rewards members are automatically qualified. That's... a little loose of a qualification, in terms of financial health.

^^^This is 100% true and by far the most important reason to responsibly use credit cards, and it applies to everyone who is not independently wealthy.  I know several people who never wanted to use any line of credit and now that they are in there twenties and thirties they can't get approved for a new car or home even though they have good jobs because they have no credit history.  Sucks so bad.

Very true, but there are still ways to get a house without using credit cards to build your credit. I currently own a house in Florida and initially had issues with getting a loan due to do never using credit cards or having a credit history, I was still able to get the loan though. 4 yrs into my mortgage plan, I owe less than 20k on the house and will have it paid off by next year. Any extra cash I make I pay towards the house, I plan on buying another in the next 2-3 years.

Your missing reason #3

3. Safety of your money.  If someone steals your credit card or you lose it or whatever reason you are not liable and you get your money back that is spent if you call in and report it.  If someone steals your debit card or gets that number they can spend every penny you own and you are 100% liable for that.  So its much safer to use credit card on things and then just pay off the credit card with your debit/bank.  

Exactly. Almost everything you do that doesn't involve one-time, point-of-sale transactions effects your credit: rent, bills, loans, student loans, car payments, house payments and so on. I pay for everything on debit as well and my credit rating is through the roof because I've always been financially responsible. You start building a credit history the moment you sign up for anything that isn't a one-time payment, regardless if you're paying by credit, debit, checking account or cash.