There's an embedded URL. Sometimes this is an ancient Nexus URL which a still-valid mod ID can be extracted from.
There's a mod description and a readme that could be set as the mod's Nexus description if there was an API to do that without directly editing meta.ini.
There's some boring stuff, but it could be used if there was ever a way to display a tooltip or preview when a download was hovered over.
meta.ini.