The guy who runs air gradient posts his articles here pretty frequently. Not sure at what point, if any, it breaks the rules. It definitely feels a little spammy to me though.
They reposted the "When paying more does not get you more accuracy" link 4 times in 2 months. I don't mind occasional reposts but that seems a little much:
I reposted it because I thought this could be quite interesting for the hn crowd. On the 4th time it got more than 200 comments. Since then I did not repost it again.
