As it happened a second time today and because I didn't find a question about it yet, I decided to start a thread about it.
Yesterday, I had this notification show up in my inbox:
As this looked interesting, I followed the link, only to the notice that DJ Adams had published the blog post in 2009!
It happened again today with this notification where the "Former Member" made me suspicious right away:
In this case the linked to not really new blog post is from 2013:
It doesn't seem to just affect me as Daniel Wroblewski added a comment to DJ's old blog post also referring to a notification he received.