Every category and niche idea is 10 saturated and when using any "filter"to search the returns will say too strict parameters.

I recently purchased the AMZ Scout Product. In the video they claim there is over 20,000,000 niche product ideas available.Yet when I searched for 2 hours straight, 8 products repeated 3 times or more. What? 8 verses 20,000,000. Come on.