Many people don’t realize that some rules in the programmatic world require ad networks to provide a public list of the sites where their ads run. If you want to get approved with an ad network this is a good way to find what they accept, including niches, content depth, and rankings (if any).
Example: https://www.mediavine.com/sellers.json
Mediavine is a popular ad network that pays better than Google Adsense but requires minimum traffic to get approved.
Surprisingly if you research some of the domains in this list you can find a lot of them owning low-competition niches.
This kind of list makes it easy to research and attack niches where you can get easy traffic and generate ad revenue.
Hmmm, maybe a niche research tool has just been born…..
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