I somehow doubt that these two guys are tightening their belts or doing much grunt work.
Attach rate could also indicate more than one thing. Software like Wii Sport Resort and Wii Fit Plus are selling very strongly showing that lots of people found the originals fun enough to buy sequels and expansions. Many people also do not want to buy a 10 hour FPS game and a 60 hour RPG every month.
That would mean something if you could prove that games are reviewed mainly on how much fun the average consumer would have with the game. Instead they are rated on things like graphics, story, marketing spend and the personal preferences of the narrow demographic who self select themselves as game reviewers.
If you are buying 6 full price games a month then, sorry, but you are the last person I would go to for advice about spending money wisely on games.