It used to not be clear at all. Maybe it is now.

https://www.ftc.gov/news-events/news/press-releases/2024/06/...

Interestingly, just fyi, they do a reasonable-person test when trying these cases. That means they literally pull 100 people off the street and ask each one to go through the funnel and then give them a quiz with questions like "How much am I going to be billed?"

So if people are confused, it's basically on you, regardless of whether you think you were being clear about the terms.