Internal comms are notoriously open, this kind of post would be a welcome contribution for explaining XCheck to a general audience outside of the integrity org. I don't know what kind of confidentiality agreement they signed but mine would have technically prohibited discussing this. Not only that, it's not time limited in nature, it applies "at all times during the term of my Relationship with the Company and thereafter".

I wouldn't expect Meta to actually do anything about this blog post but I wouldn't have felt comfortable posting it.