> So it is layers and layers of redundancy, built on a mix of other platforms and also two he controls directly (email and rss)

Not really.

There is some kind of "channel" redundancy but no "revenue streams" diversification outside ads and patreon.

Without actually paying for content, one can usually find:

- google ads, low effort low reward - brand sponsorships, high effort, fixed reward - patreon subscriptions, high effort high reward - tips and super chats and twitch - sometimes brave BAT rewards