> You may not provide the software to third parties as a hosted or managed service, where the service provides users with access to any substantial set of the features or functionality of the software.
When I read that same bit it sounds more like you can offer a product, such as some tool for your service, built on top of the library. You can't offer the library itself as your product.
My best guess at a transition point would be, does reading the documentation of the library help the end user? If so you are probably releasing the library as a product and not your own product.
Agreed, it's a shame the wording on this license is so confusing as it's a really nice framework... just way to confusing about what you can/can't do with it
So you may not use it, at all, ever?