However, they have an Acceptable Use Policy that they can update at any time, and then you have to discontinue existing use of the output to match the update AU

However, they have an Acceptable Use Policy that they can update at any time, and then you have to discontinue existing use of the output to match the update AUP, so there's no way to use the commercially (unless you have a backup plan, or decide that you're going to ignore the license).