For now, it's just removing AutoModerators and things labeled as bots. Now that I'm reading this again, I realize doesn't really help, since bots pretending to be people recommending products, don't get filtered out.
Slightly outdated (2018), but they found that only 10% of Youtube videos disclosed sponsorship: https://www.engadget.com/2018-03-28-youtube-influencers-spon...
A recent report by the European Commission found that only 20% of overall "influencer" posts disclosed sponsorships: https://ec.europa.eu/commission/presscorner/detail/en/ip_24_...