Looking at the sales chart, I always find pretty weird to see a FREE game in it. I mean, we're talking about video game SALES, right ?
So considering that Wiisport is a free bundle in USA and EU (but not in japan), I find it pretty irrelevant to see it in these charts. At this point, coherence would lead you to take in account Hexic (a free game installed on each X360) sales... which would today be around 9 millions ! But that's silly. Nobody does it, so why doing it for Wiisport ?
The worst is it's, of course, big volume, which means huge impact on market share charts, while in fact, this game doesen't generate any true incomes...
Maybe something should be "done" about Wiisport in order to get accurate datas about SALES market shares.