This was a mute that came on GoG Go #3 AWP server as far as I know.
It has CSS-tag in the Mutelist because Manggo isnt a admin on the server and made the mute from the web. And all web-made mutes got that tag.
And to write my opinion on this, I think a perm mute for spam (even if he says he's not been spamming) is a bit harsh. Specially since he's never been muted before.