Well, MS needs to break down the revenues between Gold subscriptions and microtransaction payments.
And again, between Gold microtransactions versus Silver microtransactions.
The number of people who log on is no more meaningful than the number of people who use Google but never click a single ad or sponsored research result.
The thing about some pay DLC is that it could cannibalize shrink wrap sales.
So is it right to call it a part of online revenues?
Not sure i understand your point. If MS wasnt charging for XBL, in any flavor, would this number mean any less? Since they are charging for Gold, this number holds more weight since a portion of these users are actually paying to be on live. So in the grand scheme, a mix of 6 million gold and silver users on XBL, is certainly more relevant than 6 million on another service where there are NO paying customers isnt it?
Your google analogy is flawed, with google you need do nothing but type the url into a browser window to use it. With either flavor of live there is a sign up process, so there are barriers to use on Live that dont exist on the regular ol internet.