I agree. I regularly fill carts expecting to find a coupon or abandon. At the same time, just make your coupons easily accessible on your site via a google search and save yourself some money. I have noticed this is becoming a trend and use it to avoid one more chance of malware on myrandomcoupons.com.
I work with a retailer who displays a coupon on every product page and it does cut down a lot of the normal brand+coupon searches - though there are a hard core who'll always look (unsuccesfully) for a better coupon off-site.
Sort of like how in Safeway every single bottle of wine is "on-sale". I know it works on many (most?) people but if something is always on sale isn't just for sale?
Michaels (the craft store) does this. And if you’re not getting 40% off at least one item with every purchase, you’re paying too much. Sort of like bed bath and beyond’s ubiquitous 20% off coupons, but online.