Earlier quoted context omitted.
That money bought them things like this: http://static.trustedreviews.com/94/000028992/826f/GTA-5-mur... (That is a massive painting on the side of a building, incase that isn't clear)
I'd like to know what are the ROIs for an advertisement like that. I can't really imagine that the people who will buy the game will buy it due to this advertisement. At the same time though, Rockstar probably knows what they are doing.
Sure, ROI is tough. But think about the wrong decision to not market and sales flops in the first 2-3 weeks. You can't make up that lost revenue from launch.