What you're talking about is clearly censorship and not moderation by the OP's definition - "blocking speech that both sides want to hear".
Your link is actually great for his point: people in power (OnlyFans and Meta) blocked something that both sides (their competitors, and their competitors' users) wanted to hear - otherwise they wouldn't have needed to block it. (For the sake of argument, I'm assuming that the lawsuit's claims are true - I have no idea if they are but it's not pertinent to this point.)
Your link is actually great for his point: people in power (OnlyFans and Meta) blocked something that both sides (their competitors, and their competitors' users) wanted to hear - otherwise they wouldn't have needed to block it. (For the sake of argument, I'm assuming that the lawsuit's claims are true - I have no idea if they are but it's not pertinent to this point.)