From.what I know spamming may also lead to Tempo Ban right?
It seems so, considering that Kamilaz, iwnlfr, aiguy, KimberlyCon, nathanaelung, seocrush and Lightz1337 seem to be nuked or temp-banned, while 0nline and proscratcher seem to be banned. It's either that or they just suddenly stopped posting spam.
Quite a few of them are perma-banned/nuked. I have updated the OP with the latest status. Whoever has the patience to report them - good job.