My bets are that nothing will be done about this so it will be perfectly ok to copy/paste articles. And it should be pretty obvious why he does that: purely to advertise his exchange since every first post will make his sig more visible. The more "discussion" there are in the thread, the more the thread gets bumped, the more visibility his sig will be.
People have actually been warned and even banned for copying and pasting articles before, especially when they're doing it frequently or almost constantly. It has been brought to the attention of Badbear at least so maybe he will handle it soon.