They have an API for exactly that. You can use it.

They offer a separate plan with discounts for use with their tools. You can also choose to take advantage of those discounts with the monthly fee, within the domain where that applies. You cannot, however, expect to demand that discount to apply to anything you want.

You can argue about what you want it to be all day long, but when you go to the subscription page and choose what to purchase it's very clear what you're getting.

> They are basically a utility

Utilities like my electric company also have different plans for different uses. I cannot, for example, sign up for a residential plan and then try to connect it to my commercial business, even though I'm consuming power from them either way.

Utilities do not work like that. They do have contractual agreements about how you can use the resources provided.