Isn't that what the entire article is about? That WSJ no longer gives access to Google users (and bots)?
However, I don't see cache links on Google :(
Edit: Oops, I'm wrong. The article does say that the Google bot only sees the first paragraph or so.
"The reason: Google search results are based on an algorithm that scans the internet for free content. After the Journal’s free articles went behind a paywall, Google’s bot only saw the first few paragraphs and started ranking them lower, limiting the Journal’s viewership."
So maybe this is why there's no Google cache.
Also, if Google can only index the first few paragraphs, the results are much less comprehensive.