How often am I permitted to download Auction House data via the API? The documentation says 36000 times per hour but the payload is about 10MB. 360GB per hour seems excessive
36000 is your limit for all requests not only for the AH endpoint. While you could probably use your limit only consuming the AH there is no logic in that, auction data is updated every 1 hour or so.
Also it is a good idea to always use the If-modified-since request header to only download the data if it is recent as discussed on this topic.