Someone thought that research was an official work of Purism because it was published from the Purism forge. Purism worried that others would make the same mistake, so they made the repository containing the DDG article private (which makes it unviewable). The history of that is here: https://social.librem.one/@kyle/106030261909967024

Non-version-controlled copies are also published here:

• http://techrights.org/2021/03/15/duckduckgo-in-2021/
• https://o.perezdecastro.org/5hjg6ox0.md