关联箱，容量48，堆叠100，10个红瓶研究可用，只需一个铁板就能做 默认link_id为0；当第一次放置link_id为0的箱子是会自动将link_id设为1，第二次设为2... 复制已放置的关联箱产生的关联箱link_id相同
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