Looks like I was right the first time around, though a bit too quick to post.
Answering my own question the graph was used on
https://puri.sm/road-to-fsf-ryf-endorsement-and-beyond/ first and Todd then
revised the page to include:
" *NOTE: PureOS is working to get FSF Distribution Endorsement, in the above
diagram we are referring to Trisquel, which PureOS adds packages to."
While not archived by archive.org I was able to pull up the original page
from Google's cache:
http://webcache.googleusercontent.com/search?q=cache%3Ahttps%3A%2F%2Fpuri.sm%2Froad-to-fsf-ryf-endorsement-and-beyond%2F&ie=utf-8&oe=utf-8
The page has also been preserved here just in case Google decides to update
its cache: https://archive.is/HBDm3
