Proof that after Youtube changed their algorithms to stop recommending conspiracies they lost a lot of money. It turns out they lost 8% of their ad revenue immediately after the ill thought decision.

https://www.cnbc.com/2019/04/30/youtube-algorithm-changes-negatively-impact-google-ad-revenue.html

“While YouTube clicks continue to grow at a substantial pace in the first quarter, the rate of YouTube click growth rate decelerated versus a strong Q1 last year, reflecting changes that we made in early 2018, which we believe are overall additive to the user and advertiser experience,” Porat said on the company’s earnings call Monday.
Porat didn’t expand on precisely what changes at YouTube led to the poor ad revenue growth, and Google isn’t saying anything beyond her statements from Monday.

Ha Cause and Effect..