I think its a pretty safe bet to say their sales have gone up because of the numbering. In that aspect, you're probably coreect in your "pulled a fast one" statement. They just didn't pull a fast one on me, I'm far to smart for them.....or something.
And I wholeheartedly agree with your Time of the Wolf comment. That, IMO is Haneke's best film. And I bought it for 8 bucks.