.tab files are starting to be added to Commons and used in graphs and in other ways in Wikipedia e.g
https://en.wikipedia.org/wiki/User:Doc_James/OurWorld
However this work does not show up in metrics tools like BaGLAMa 2 and others because currently .tab files cannot be added to categories. This inability to provide metrics on use of content is restricting people's ability to work with potential partners who hold data to convince them to make it available under an open license