I don't think it's much of an effort to not spend £400 so you can play a video game. A conscious effort would be more if there was something that was very easily done and potentially beneficial / worth the cost etc.

I doubt anyone who has an Xbox One is actually saying to themselves that they would go and buy RotTR and that they want to and have the money but are choosing not to because of the fact that there was a one year timed exclusive for PS4 owners. I would say it's more just a case of Fallout 4 coming out at the same time and also the fact that you can only buy it if you already own or are willing to pay for an Xbox One. These two things are far more likely to have impacted sales than a conscious effort to try and create change.

In other words, the people aren't making the effort and that is because of their priorities, not moral grounds.