so you can report a message thread to fb for abuse and then contractors check the messages to verify for said abuse. how is this news? it's the equivalent of taking a screenshot of a whatsapp thread and reporting that, doesn't affect e2e encrpytion in any way.
If someone other than sender or recipient can read messages -- it's not E2E.
If the recipient then sends those messages to the cops, that doesn't mean it's not E2E.
Of course there's a bit of a sliding scale here. If the recipient automatically and unknowingly sends all past messages to the cops when they try to report a single abusive message, it's not E2E but it sure is a back door. It's not clear from the article just how much history is sent with each report.