Fab.com: How do I know which license tier I have?

I then asked a lengthier question regarding the license type required, which every other company would be able to answer, and the response was wholly unacceptable:

QUESTION: "How do you define “commercial activity in the digital content industry”? If I am a musician and create and sell my own music via iTunes, Amazon, Bandcamp, etc, then that is digital content, but it has nothing to do with gaming or with Unreal/Fab assets. If I write eBooks and sell them on Amazon, etc, then that is digital content, but it has nothing to do with gaming or with Unreal/Fab assets. Do either of those scenarios count toward your “commercial activity in the digital content industry”, and if so, then why?

What if I create and sell my own music or other assets on Unity Asset Store, Fab, or other asset marketplace? Do those count as “commercial activity in the digital content industry”, even though they have nothing to do with creating a game myself, and if so, then why?"

ANSWER: “Unfortunately, we are not able to provide more specific feedback on this to buyers. If you are unsure of which license you require at the time of the transaction, we recommend reviewing this with your own legal counsel.”

So Epic/Fab create an End User License Agreement, place specific terms in that agreement, and then refuse to define those terms, ensuring that you CANNOT know if you are legally abiding by the license agreement.