How recently? Up until Wednesday last week, I believe every single ad was placed by the creator. Some just go more wild with it than others.
(disclaimer- I work for the Goog)
(disclaimer- I work for the Goog)
There were some other creators that I saw some less egregious but still questionable cadences with, which I thought would go against their general ethos (like ads every five minutes on an hour long video by a person who is generally against a culture of over-capitalization).
Maybe A/B tests?