Advantages and disadvantages of online coupons, digital vs. print coupons
Therefore, a customer will only need to visit these sites often and look for the desired deals. Coupons are not horrible. They can either be public, private or restricted, meaning that they have only one use per customer.
However, there are ways how to stop, or minimize this behaviour. Quality could be sacrificed - You may end up limiting the quality of your services based on the decreased amount of the money you are getting from these vouchers. That way you can build an email marketing base to encourage their return when offering new products or for other marketing campaigns.