The link is the same but with ?mod=rsswn added. Adding that also appears to work for other WSJ articles for me. No idea how OP found out about it though.
You can append ?mod=rsswn at the end of WSJ urls to get non-paywall links. I submitted the story with this param but for some reason it's missing. Maybe I made some mistake in copy/pasting. I learnt about this trick from a HN comment in the past.
