From a cursory glance at the site and source code, it's really hard to see who/what is involved with building an archive. There's automated builds set up for the Pi image itself.
It sure doesn't harm if someone creates their own ZIM files and reports on their results (and/or shares the resulting files).
https://github.com/openzim/zimfarm/blob/master/worker/README...
Maybe it would be worth putting together another zimfarm that is constantly updating.