Ed. here. 51 weeks ago Walt wrote "Politically correct toothpaste makes your smile brighter", which explained how "Darkie" toothpaste was gradually transformed into "Darlie", after the original manufacturer, Hazel and Hawley, got taken over by Colgate-Palmolive.
The change was made for reasons of political correctness because C-P didn't want to risk having a black blot of racism in its copybook. That was the point of the post.
For some reason, a link to Walt's post appeared on the much-better-known Reddit website this weekend, in a thread called "Chinese cuisine ad in Kuwait".
Here's the picture which started a very long discussion full of racist and anti-racist rantings! WWW got drawn into that, giving us 20 times the usual number of hits on Saturday. Amazing.
Footnote: Reddit's founder committed suicide on the weekend. Surely no connection!