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YouTube just made it harder to avoid ads with a tiny skip button
(www.androidpolice.com)
This is a most excellent place for technology news and articles.
They still build recommendations even if you're not logged in, you can see them in the sidebar after you load a video. Imo they only removed them from the homepage to try convincing people to log in or create account, it's all about increasing user numbers, ad engagement, and data collection these days.
They can base the recommendations on your subscriptions.