example
edit: Looks like you have tons of these spamming on HN
https://tendayweekcalendar.com/
This really sucks. Hate these so much.
You comment history is not 'A bit of self-promotion' wtf. you do not give a shit even if ppl are calling you out for being disinginous and passing these off as something you discovered.
The first page of their comments go back 7 months. I don't agree that reaches the OPs bar for an 'explosion', but you do you.