Simple one: Is it reasonable to download the DB Export CSV files from you every single day? I appreciate it isn't a small amount of data

Yes, but you should only download the current days exports if you're going to do that. Export time is not 100% stable and varies by about 10-20 minutes each day. So don't race to hit it right as it comes out.

This is neat. I had no idea this was available. Yeah, CSV is old hat. There's little reason to make your own JSON/CSV/RTON/etc. parser.