If they have an open documented API and you are using it, then I would stand your ground. What are those 90k pageviews worth to them? What are they worth to you

If they have an open documented API and you are using it, then I would stand your ground. What are those 90k pageviews worth to them? What are they worth to you? I imagine they're worth more than a few hundred bucks to you. How many hours have you put in?