Quality affects locomotive speed and wagon capacity, scaling like most items in the game (1.3x uncommon, 1.6x rare, 1.9x epic, 2.5x legendary).
Mods introducing new content into the game.
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