here, the video which started all: https://odysee.com/@rossmanngroup:a/change-your-profile-picture-to-clippy.:e

and where he goes a bit more into detail and talks about many of the points seen in this thread: https://odysee.com/@rossmanngroup:a/you-changed-your-profile-to-clippy-now:6

It's about Clippit, which was a mascot that notoriously annoyed MS Office users in the 90s and 2000s. It did not yet collect your data the way everything does now.