I personally think this last sentence from my quote makes it unclear:

"In short, if you use this project to generate revenue, the Open Source Maintenance Fee is required."

Perhaps I'm being too semantic, but I don't feel that is an accurate representation of the license terms involved here.

It could add 'and expect active support FROM US' and be more accurate.

I guess it's treating 'if you are generating revenue and need support you're gonna be demanding as hell' as implicit?