PrinceOfFacade
Ghost-Type Master
More of my point was that I believe there is a mulplicative effect when these titles come in pairs. Somewhere between selling 1x to 2x as many copies compared to a standalone. Of course, there are other factors, but that is a contributor.
What I'm saying is there is no multiplicative effect.
The games aren't selling twice as much; it just appears like it because there are two versions. Maybe close to 1.5x because of some fans buying both versions, but it isn't a significant increase. They are ultimately selling as much as they would if there was one version.