Earlier quoted context omitted.
Blame WordPress / Jetpack. I am a follower of her site for years, have all her books. What crashed her site I have no idea but it has never been the same since. It's a shame that Automattic - who created Jetpack - never reached out to help her restore the site. They have no obligation of course, but given her profile, given the massive good that she does, it would have been decent of them to do that.
WordPress person here: How is Jetpack at fault here? I deal with "redirect loops" on WordPress websites on a regular basis, and I've never found Jetpack to cause the issue - do you have insight here? FWIW I see no redirect loop on mobile (iOS/Safari)
How is it at fault? I have no idea.
But hey, it's a WP site, with Jetpack and I'm sure with Automattic's 'shadow site' ability they can diagnose it.
They - Automattic - as I have said could do the decent thing and help Jack Monroe to restore her site to being functional.