Even if I want the article they are selling, and even if the price is the lowest, I will never order anything from a pop-up ad.
But clearly I am in a minority as these ad companies would not invest in such technology unless they got back a good return. So some people (probably many people) are using these pop up type ads to order stuff.
The problem I have is that with a "traditional" pop up ad, the person has to deliberately click on the ad. This generates a report back to the advertisement company and they can, in turn, report that their ads generated so much interest because a number of people were interested enough in the product to click on the ad.
Hence the term click-revenue.
Since I have no interest in any pop-up type ad, I never click on them.
But these mouse-over ads are a way for the advertisement companies to report higher interest in the ads by reporting mouse-overs as interest in the ad. Unfortunately, a mouse-over does not always indicate interest.
But as a customer of a website, I don't really care. As long as product manufacturers can be conned into paying to support websites that I can access for free, I am happy.
I think that the product manufactuers might have a problem with the advertisement companies, but advertisement companies are in the business of manipulation and lies.
Someone has to pay for my access to these websites. I am not miss-representing anything so morally I am in the clear. But if some ad company can scam a product manufacturer/seller into paying so I don't have to pay, more power to them.
At the end of the day, I am still getting something of value for free so I really can't complain.
The ads we see are tailored to each user using the cookies placed on your computer from previous visits to other web sites. If you look at a Nikon D810 on Amazon, you will likely see ads almost everywhere you visit.
You can turn off some of the annoying ones by clicking on the tiny icon in the corner of a ad and then selecting your preferences.
CR can, or used to be able to block a few ads (Limited number) and they used this to block obvious camera scam ads).