@JeremyCherfas All direct donations thru PayPal or checks. This has been their model since 2008, well before Patreon (which they don't use). People who donate $50 and over get mentioned on the show. $200 or more buys an (Associate) Executive Producer credit (which people use in IMDB). $1,000 or more in aggregate gets you a knighthood, which gets you a knight ring. And, yes, there is other peerage above that.
Note this setup took a couple of years to refine. The show is also open-source and there are several related producer projects, of which you could count my "No Agenda Quotes" account on Twitter and my "No Agenda Ringtones" page as two.