I should have been posting this bite-sized news yesterday, but I’ve been feeling under the weather lately (I blame Steerpike and his relentless beatings). So I’m posting it now, instead. Forbes Magazine in February’s issue have revealed that Steam controls up to 70% of the $4 billion market for downloaded PC games, with a staggering 200% year-over-year growth. Although Valve have never revealed their turnover or profit margins, its fair to say that their profit will undoubtedly …