I frequently encounter 1-off review sites that are owned by the #1 product on the list. Many are transparent about it, and some even do a good job listing their competitors and describing them in a fair light. I think they are mostly a response to Google's algorithms prioritizing reciently published blog style top-10 lists.
Here is the first result when I google "best free youtube downloader"
Here is the first result when I google "best free youtube downloader"
https://www.gihosoft.com/hot-topics/best-free-youtube-downlo...