新增一个小白箱，使用蓝图工具中新增的链接工具可以将不同的小白箱进行链接，链接后的箱子（总量不得超过48个）共享库存，通存通兑。
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
