The statistic that I read about years ago is that around 50% of mail-in rebates are not even submitted, and around 50% of the ones which are submitted have some kind of error in the form invalidating the rebate. So, compared to a sale of say, $5.00 off applying to all customers, the same item could be offered with a $20.00 mail-in rebate that would only apply to around 25% of customers. The $20 mail-in rebate sounds more enticing than $5.00 off up-front, so it lures in more customers, and costs the company the same amount in the end. I mention this because in the article, the writer states he'd rather receive $15.00 off up-front than $20.00 off through mail-in rebate; in reality you'd be more likely to receive $5.00 off up-front if there was an equivalent option to a $20.00 mail-in rebate. They fall into that gray area where it's difficult but not impossible to receive.