With the help of the web archive, I found out something about the card and other smaller items at least. The majority of the news entries weren't archived, though.
But I wonder what the hell happened to yumenikki.net. Was it hacked?
I mean this was the last official entry for two years https://web.archive.org/web/20161104003338/http://yumenikki.net/archives/category/news
and then the links and sites disappeared step-by-step and the news blog got replaced with random crap:https://web.archive.org/web/20170719021859/http://yumenikki.net/archives/category/news
What the hell?
Yep, it looks like it was raped by spam bots.
Well deserved, in my opinion.
I'm glad the fraud is over.
Since Kikiyama has basically been silent for many years despite the popularity of Yume Nikki, it is very unlikely that this merch is being made with his permission.