Modding matters. (and it doesn't)

[Voigtkampf]

Elder Scrolls games aren't a good example. The PC versions of the previous 2 ES games shipped with editor programs. It's part of the ES game experience.

I called it out as an example on how the modding possibilities made Skyrim even more popular than it already was, definitely boosting its sales, as opposite to, say, TW games that are less and less friendly to the modders.