Not happy with new feature auto opt-in

I've been really happy with TidyCal. Until today, when I learned about the new review and email features. Why would you not have a toggle to turn off review options? And why would you start sending out a new feature like emails automatically. We should be able to opt-in to new features, not have to opt-out of them when we stumble upon them by accident. I'm really irritated by this.