Because you get it for free when you buy a wiimote

Not nearly as large as the Wii, however. The Wii has had roughly 22 million bundled games versus 3 million for the X360, and (roughly, someone else can give better figures), 4 million for the PS3. Quite a contrast, no?

No you get a wiimote free when you buy wii play. Also its not mandatory to buy it, but somebodies choice.

Actually the game costs 10$ since Wii Play costs 50$ and remotes on their own cost 40$. The main reason why Wii Play is not counted is to silence people that claim that Wii can only sell Wii Sports and Wii Play. Although, it does not achieve much because even when you have the words "Wii Play not included" bolded right in the middle of the data somehow people manage to completely ignore that or they just change their tune a little bit to Wii can only sell Nintendo games.

Regardless of whether the Wii has actually sold more (total) software at this point in time, it has been on the market for far less time (and probably has lower ownership-months) and is at a point where it is consistently outselling XBox 360 software on a worldwide basis ... This is enough to demonstrate that Wii owners do (in fact) buy software and are not just playing Wii Sports.

The fact of the matter is the comments that "Wii owners don't buy software" and "Third party software doesn't sell well on the Wii" are PR statements that are designed to generate talking points to (hopefully) prevent Nintendo from capatalizing on their lead. Microsoft is fully aware that third party publishers are crunching the numbers and can see that (at the current rate of sales) they will be able to produce a Wii game for 1/4 to 1/2 the price of a HD game and still see potential sales at the same level as a multi-platform HD game (or higher); their goal is to convince publishers that the Wii is not a safe investment, and that they will lose money if they don't develop a game for the XBox 360.

 now even without wii sports it sells more

Aren't they doing this already ? >_>

omg, what did you expected the losers to say, even if MS's Xbox360 sales the most, they would still be losers, they are acting like a low-class company, isn't the WW Windows marketing enough, they don't need to own gaming as well.....

Er..."bolded" for truth!

Well you can't blame PR reps for doing what PR reps do , spin.