Installed on 2,019 of the 46,798 servers crawled, 685 of which have players on right now.
Inferred, not declared: these resources are nearly always present when this one is, but frequently appear without it. That asymmetry is what a dependency looks like from the outside.
This deployment indexes membership for the busiest servers only, so it can list 271 of the 2,019 servers running this. The count above is network-wide.