Probably related to soliciting donations (See "Businesses that are prone to abuse by fraudulent actors" on that Stripe link)

A lot of payment processors do not like it when individuals (versus certified nonprofits) take donations. Because, well, it is more prone to fraud. It's a really easy way to cash out stolen credit card numbers. The systems are set up for a transaction, not a one way transfer of funds.

The first linked website (https://www.barnhardt.biz/) says (if I'm understanding it correctly) some pretty unkind things about the Pope regarding to his conciliatory attitude towards homosexuality.

Stripe's page says that their prohibited categories include "Businesses that engage in, encourage, promote or celebrate unlawful violence toward any group based on ... sexual orientation..." among other things.

Practically/realistically, there's also some content in the podcast that's going to make payment processors nervous. Even if made with best intentions, legal departments will worry eventually someone is going to end up sued or worse, and the company will be named. Even algorithmic filters are likely to class this as fringe/conspiracy. So regardless of what rule they're pointing at to cut the account, they may really just want to cut the risk regardless.

https://www.barnhardt.biz/category/barnhardt-podcast/

For context, some random excerpts from barely a skim that jump out and are going to raise eyebrows:

203: "we attack the topic of In Vitro Fertilization and break down how this grotesque process" 195: "part of what made the fires in Hawaii worse than they needed to be: the deeply-seated paganism of the natives who worship the volcanoes" 191: "it’s possible that “they/them” pronouns are favored among trans because of the demonic they/them legion possessing such poor souls" 187: suggests extracting and storing your own blood and taking methylene blue?

I don't have all the context, and generally I do support the author's right to expression, so I'm trying to be objective and kind here. But candidly, I'd have difficult to overcome personal reservations about partnering in business with (and in Stripe's case, since they take fees: profiting from) the content here.

I don't mean to offend anyone, just seems like an elephant in the room worth noting.