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.
Ok so here's the story.
I originally created passphrase.io.
I sold the domain and license to use my script to devthedev.
A few weeks before the domain expired, I warned dev on two separate occasions that he needed to renew. Once via email and once via PM. I even offered to buy it back from him, but he ignored.
He allowed the domain to expire, and I bought it back.
Also, I think devthdev mentioned somewhere that he did buy the domain+hosting from someone else
Well there you go. Devthedev probably didn't even realize that the domain was (about to) expire.