With the Coupon Roulette add-on installed and enabled, your online store customers will get a chance to win a discount when they enter or leave the site, depending on the settings.
The roulette will pop up on the screen with a delay specified in the add-on settings and offer a visitor to try good luck.
The buyer needs to enter their email address to spin the roulette. All email addresses are then registered in your store's Admin area, where you can export the list if required.
The customer will see the coupon code providing a discount in case of success. It will be necessary to copy the coupon code to use it at checkout.