Did the prevention of piracy result in more sales or just less people playing the game? Were the units sold to the user base of "bought it because they couldn

Did the prevention of piracy result in more sales or just less people playing the game? Were the units sold to the user base of "bought it because they couldn't pirate it" enough to cover the cost of implementing DRM and running/maintaining the online component? What about the units lost due to the negative press at release as reviewers were unable to play the single player component?