Paywall work-around: https://t.co/jZyOpZbbtD
In this case: http://archive.is/5n84J
Whenever I hit a paywall from an HN link, I immediately go to the comments to see if somebody has linked to the full article. Thought I'd help folks out since nobody had done that for this article yet, but if I'm out of line I won't do it again.
That would explain it though.