To be clear, this is not restricted to content posted on Facebook. It’s any content posted on any website owned by the customer.

You authorize us […] to […] create test credentials to […] crawl the domains […] associated with your products or services.

Meta may use any content […] to […] train […] Meta Company Products.

Basically, in exchange for being allowed to continue posting content on Facebook, you’re giving them permission from now on to aggressively scrape your own sites for content to train their models.

To quote a famous Sith Lord: “I am altering the deal. Pray I do not alter it further.”