Re: What about the astroturf then?
Our five per three month rule catches 99 per cent of spammers, shillers and astroturfers. Very occasionally people report someone who is an astro-turfer - we zap their account. But most imputations of bad faith are made by commentards with their own fanboi axe to grind.
As for The Register - we published 13000 articles and produced a couple of dozen sponsored webcasts in 2011. We try very hard to make all our content editorially valuable. If we fail, you guys let us know via the comments pages.