I applied for a credit card to get a $100 gift card. Now what?

• business secured credit card
• prepaid business credit card
• accepting credit card payments
• pre approved credit cards

I applied for a Discover card to get a $100 gift card. I made sure there was no annual fee or anything like that. I will not be using this card. Now that I have been approved, should I just keep the account open and cut up the card, or should I close the account?

I applied for a credit card to get a $100 gift card. Now what?