I don't know why he uses two accounts!
Whenever I plagiarize myself, I try to check the links and refine the text to keep it relevant.
Just posting a link to an old article requires less effort for me, but more effort for other people to switch context, navigate and read. And a server's disk space and bandwidth aren't as precious as a reader's time and effort.
It was not my intention to trigger mdekkers into having fits about SJWs, or shocking paxcoder who is not a gay supporter.
I suggest however that when you do, you add a line to the bottom that says something along the line "This comment was based on an earlier comment I made X days ago using another account." when you do just to keep people from accusing you of plagiarizing others.