Most trademark holders have much more solid ways of demonstrating their mark's use in commerce, like financial and business records.

Right, but I think this case is interesting for the developer community as it targets specifically open-source use-cases, where you usually have neither extensive user per-country data, nor would you usually care about tracking, or have commercial offerings. This essentially means that you either cannot protect your open-source project name or have always to keep in mind to collect user per-country data, otherwise you risk getting deleted.