I'm not really sure with their wording either. Like the 'RAM not included' Actually says '(RAM module not including)' on the front and later in the description 'Product does not include RAM Module'.
Their first Contact information is from a place in Taiwan, so its most likely a mistranslation.
(They also have two US offices, so its not like they're some random foreign company
...though that should mean the site should be better, but yeah.)
However, they are the first I've seen in a long while to actually offer physical RAM drives, though I'll admit i havn't looked hard for one in the last 4 years,
and honestly my use for a RAM drive would probably be much more mundane then most people. First thing I'd do is throw my swap file on it, which would be my Main use for it. Otherwise I'd like it for anything that needs temporary harddrive usage, things like browsers or like when 7zip first extracts files to my harddrive before moving them where i want them. (I find that so annoying.)
Mainly just to try to lower the read/writes to my normal harddrive, things like that.
I honestly can Not remember who, but a few months ago I read someone (I Think Intel) is working on a chip to help merge files from a traditional harddrive and an SSD drive. What its supposedly supposed to do is move like your 'most used' files from the traditional harddive to the SSD for faster access. I found that a rather cool idea and would like to see it come out.
Even though with my computer from like 6+ years ago, I couldn't use it, it still seems like nifty tech.