If we know that you are going to cancel the account after a month, we will not offer the discount. We get an affiliate referral commission for each customer that signs up for hosting. We use that commission to offer the steep discount on our themes. When a hosting account is cancelled, we lose the commission. The more often that happens, the less likely it is that we can offer the discount. That's why we would not offer the discount if we know that you are going to cancel.
We enjoy providing this discount to customers. We want to make sure every customer gets as much value from our products as possible. We would ask everyone to consider this when taking advantage of the hosting coupon.