I think it’s aes keys per match for the muxx feeds, weekly updates for the core feed.
Look at the dates & filenames in the webif capture: it's one bundle of 32 keys per week, generated on a Tuesday, hitting the box usually on a Friday or early hours Saturday, just in time for the day's events.
So yes, enough keys for one per match if they feel the need. Not much of a time window for them to be leaked
Bit of a hiccup around the weekend of the 23/09/2017... keys didn't hit the box until the following Monday
I guess ASIA should (must) be weekly too, just missing from the log.