[wongarsu]

It starts with the words "As part of our continued collaboration with Anthropic"

Once these words are used you can assume there is a contract stating how that collaboration works, and that this includes some sentences about how much each side is allowed to or required to say about it

[warkdarrior]

So you claim that Mozilla entered into a contract with Anthropic, and said contract requires Mozilla to advertise for Anthropic on their blog. I hope Mozilla is getting a good payday out of this.