I'd expect Mozilla to be more invested in the "pay with $, not ads" approach compared to Google. Mozilla owns Pocket, which has been relatively good at finding longreads type material on the net and rendering it in a reader-mode view, so I think they're a better cultural/philosophical fit.
I don't use Patreon. IIUC, you need to sign up to support different content providers individually. That's not what I want.