But it isn't clear that this all happened because of "promoting a social cause." It's equally likely that they just thought it was a super-juicy story and wanted the pageviews. And indeed the article was super-popular - the most popular ever except for "celebrity stories" (whatever that means). That is motive enough for a paper to publish a story, sadly.
The full report doesn't corroborate ideological causes here; the closest is over-caution at disturbing the accuser and stopping to investigate wherever she asked.