I actually didn't say that $99 is unreasonable. I'm just saying that I would see the effort involved in adhering to this license in a commercial or open source

I actually didn't say that $99 is unreasonable. I'm just saying that I would see the effort involved in adhering to this license in a commercial or open source project wouldn't be justified by the functionality. In this licensing model, it is far from certain that the library will continue to be developed and supported. I do understand that buying code can be a very good choice. But the decision isn't just "purchase price" vs "features".