If you are visiting the same sites and see the same ads all the time, it means they are converting well. Examine the ad, download the image for reference, check the site, check their sales letter and video, gather all the data you can.
It is all there, clear in the open. You just have to pay attention to ads that most people ignore and block. Generally, the longer something is advertising, the better optimized they are for sales.
Just throwing it out there.