I just signed up DX's newsletter and received a free $5 coupon. You need to verify your email after subscribe and you will receive the coupon which looks like below. Good for someone who is planning to buying something off them. You can unsubsribe the newsletter at any time.
We would like share our service with you as well as offer you a free coupon:
Coupon Code: XXXXXX
Amount: $5
Minimum Order Value: $40
Period: 1 month
Use Time: 1