Well, it's not necessarily 'false', but saying "many people bought it outside of Steam" certainly suggests something that is completely false.
Yes many, becouse are not the majority, are few of the majority, but are many of good number of very active users.
it is easy to meet this reality, simply lurking this forum, which is not a small community. (I have to admit that i have not statistics, but only empiric experience of the community, and not only this forum.)
For sure this for Paradox does not mean more money, but from the point of view of the vitality of the title, this is important, also because this vitality draws to resume play at various times. And even if quantitatively is a minority, is a minority made up of many players who certainly would give a boost to statistics regarding the hours of game play.
Among other things, I'm not saying this in a "anti-steam" way or other point of view, but in an objective sense that not should be ignored, because for the rest I'm a steamer of the first hour. :happy: