Canonical Sponsor and minor resource sponsors
When we stop using their issues tracker, just using the PPA system to support /their/ operating system doesn't really make them a sponsor of the project, We could morph the entry into 'Linux Distro Packagers' and cover ground for all the different people and services that build inkscape. Or we could drop the link, which is my preference since project sponsors are really people or companies that contribute in an active way to the project or at least offer a free service that gives the project infrastructure to itself.
For example, why keep Canonical and not add Google (for GSoC and google sheets which we use). Or not add Microsoft, who have a store build of Inkscape. Or Freenode who host our chatrooms? Maybe all these little resource sponsors should be text only links and we can spread the joy around.