The name was likely first coined in in 2011/2012 when the notorious deep web levels info graphic was created. A 2016 4chan anon claims to have found a screenshot of the service in 2013. The poster claims the screenshot itself was taken from 2011. An unpopular 2013 YouTube video was created by the same name based on the idea.
Interest on Twitter
On March 18, 2021 Twitter user @jackstyler2, linked to a piece of music, on Youtube, which inferred that CAIMEO / LIONCUBE were to host an AMA via the Google owned video streaming site.
ACCESS TO CAIMEO IS NOW RESTRICTED TO ALL BUT ‘SYSOP’ VIA THE XIVMK OS.
SYSTEM I/O OPERATIONS AND BROADCASTS WILL NOW BE LIMITED FOR SECURITY PURPOSES.
I found this floating around on anonchan back in 2013 before it was shut down. If you don’t know what CAIMEO is, look it up. I’ve seen all kinds of shit on the deepweb, and ths is what scares me the most. Aparently some guy fo und a way to mass-generate valid .onion urls and test them and lef it on a server for a few years. He came across a bunch of really dodgy shit, but he posted a while ago on some of the l2 sies with a bunch of screenshots of this website. This was back in 2011, I think. KPSUS SGAI CAIMEO. He took reqests from 22chan (the non-clearnet one) and they managed to figure out how to index allof the files. It started bringign up text files, around 1800 logs, all signed like “~J/211103” and “~J/050509” about this group of people working on projet CAPPUCINO, heaps and heaps of code too and these picures of a particular girl. Noone has really figured out what it was,I still dont know.