Thanks for the clarification.
I agree that it’s fair to share the revenue for commercial use, and I’m definitely not opposed to paying for a good-quality product. However we are looking to keep our end-user costs for this project to a minimum; and my main attraction to this library was the first-glance possibility of it being free. So I suppose we will continue exploring our other options, but I’ll keep this in mind if we can’t make something else work.