Assembly machines needs a bot for each craft. The bots can't be crafted themselves, but they do occasionally replicate. However, they can't be destroyed, or even stored - at least not safely. Maybe you'll find some ways to keep them busy.
Counted when a user downloads a mod release for the first time. Before Nov 2021 it counted everytime a user clicked the mods download button.
Counted when a user downloads a mod for the first time. Has no data before Dec 2022