Nitpicking time: The link in the blog post just goes to a list of instances that have chosen to defederate. The reason it's not going to any sort of official Fediblock list is because Fediblock was shut down years ago. The author of Fediblock expressed the specific intention of not being definitive in any way and for people to thoroughly cross reference listed instances' standards with their own. My intuition tells me that the author wanted to link to the entry of Fediblock, and failing to find it, substituted that link for its nearest equivalent without fact-checking anything ever.