Coupon Code For Brainstorm How Do I Receive A Coupon Code In My Email From Yahoo Shopping?

How do I receive a coupon code in my email from yahoo shopping? - coupon code for brainstorm

If I noticed something in my e-mail about the color purple, so I clicked on it and led me to Yahoo shopping. Then I realized one thing to enter a promotion code. Please tell me how I can get a coupon code to my e-mail from Yahoo. I would be a first purchaser.