I flagged your last four posts, since I think you're spamming HN by posting not really substantial links to your own content within less than 10 minutes.
That's my way of posting on HN. I have noprocrast activated, and connect once or twice a day to post links I found interesting during the day. Usually they belong to the same browsing session, so they may be about the same topic or from the same domain. This time, I was browsing supermemo.guru and found those to be interesting, so I posted them.
I don't think they are spam nor insubstantial, HN is for anything that satisfies intellectual curiosity.
https://news.ycombinator.com/submitted?id=yamrzou
(I feel obligated to post a reason for flagging submissions)