Well, once it reachs 10 million MS probably will make ad about that, and more ads means more people getting interested. So, should we expect a good jump in sales once it officially reachs the 10 million mark?

I don't know. I think it will be around 11 million at the end of it's run.

I doubt reaching the 10 million mark will cause an increase in sales. We might see an increase before Reach comes out.

No, but ODST and Reach will spark small bumps to H3.

I see it giving Halo: Reach giving it a higher launch than Halo 3.

Nope.

Don´t think so, but it wiil reach 11 million at least.

An ad celebrating 10 million mark? Never saw no one making that.

I doubt MS will make an ad at 10 million, to be honest. Even if they do, I don't expect enough extra sales that it could really be called "another boom"; more like a blip.

The cost of the ad wouldn't be enough to warrant the additional sales.