I won't argue of course that digital distribution is not good for the PC market, never had in this whole debate in fact. All I object is the idea of how the distribution is done. There is no need for third party software on a PC if the game does not take advantage from its features. Like X for example will not take advantage of the only useful feature Steam offers, a reliable multiplayer lounge. There is only one platform I would accept if I had to which is GfWL because it is from MS and tied into Windows anyway. Apart from GfWL as a platform, the only way for digital distribution to go is the way GoG.com does it.
Still I am sorry that I do not see the almighty Steam as the saviour of PC gaming nor do I think account binding in general could be the future. May my Internet connection burn and may my download speeds become 56k again.

@Slug
As said in my last post concerning the digital distribution quota, let it be the whole 20% that were sold on Steam and nothing was sold on GoG.com if you think that this is more realistic. This does not in the slightest alter my argument that the mass majority did not buy the game on Steam.
I still doubt though that you can make up the number of people using Steam by the number of active accounts. If you have three games on three accounts that you play over a month (in my opinion very likely) you will count as three different users. I think you have to estimate the real numbers from the daily statistic peak. The way I did it may not be the best, but a good shot I think. The only reliable way to find out would be to track IP or MAC addresses for all logged in accounts and see how many of them are the same, thus same people.