From the Terms of Service (emphasis mine):
6. Restrictions on Use
You agree not to:
Use the Service for any unlawful purpose.
Attempt to reverse-engineer, modify, or *create derivative works of the Service.*
Share, resell, or distribute downloadable data provided by the Service without explicit written permission.
Do you intend to delineate the data provided by the service from "the Service" itself? It seems most fair that data received via Fair Use remains in that arena, pun fully intended.That aside, it's an intriguing dataset nonetheless, but I'd prefer to see a sample of the data before signing up.