“Online coupons are usually valid in a store, but if you are targeting promotions (to new subscribers, for instance, or high-value customers), the last thing you want is shoppers finding those special coupons on the web and using them. Easy-to-use coupon managers are available to take the work out of generating personalized codes.”
Utilize a quality coupon manager to avoid seeing your email coupons on coupon sites. A manager allows you to keep your coupons exclusive to your subscribers, which helps prevent them from opting out. After all, if they can obtain your coupons anywhere, will they be as interested in subscribing?