How's that surprising? Apple and Google get away with 30%, if Facebook is building a whole universe of content then their compensation should scale with it, right?

Joking aside, the current precedent is that these vendors can charge whatever they want on their own platform. I wouldn't even be surprised if this was a strawman designed to spur up litigation against them so the court would finally take these "first party payment processor monopoly" cases seriously. That, or, they get away with it and bump the comission up to 80% or something similarly obnoxious.