Did someone forget to renew their domain?

Think that might be the explanation.
The whois record was last updated on Feb 29, 2016, which would point to the domain expiring and then Unchi quickly grabbing it.
the question is what about hosted script on this domain name
I can only speculate, however it is possible that uchi saw that the domain was about to expire and saved the script and/or uchi used an archive of the website.
edit:
uploaded 5 days ago
http://archive.is/hXS8B seems so, quite a coincidence considering the script was made public just near the time the domain (as said by QS) was renewed.
someone archiving the site a week before the whois changed (this does not necessarily mean it was renewed -- I think) would be an indication that they were planning on taking the domain after it expired