Looks like Marc Berman released the renewal too early as he has now deleted his article :)
I've also made a copy of the tweet in case that gets deleted to. I suspect they were under some embargo with FX Networks and he accidentally hit publish instead of schedule :)
FX Renews “American Horror Story” for Two More Seasons https://t.co/AKXcuZunZB - Programming Insider https://t.co/p2JJu7Cqmt
— Programming Insider (@PIUpdate) January 12, 2017
To-date, the “American Horror Story” franchise has won 15 Emmy Awards and dominates FX’s top-rated telecasts of all time. In persons, 18-34, for example, 12 of the Top 15 most-watched FX telecasts historically are from “American Horror Story.”