Isn't the demo itself just an advertisment? When all is said and done, EA and 2015 will come out ahead because more people will see the demo. While I can see how coming up with advertising that you actually make money on would be an attractive thing (i.e. selling the demo), I don't think any game company would EVER take the time and money to make a demo if they didn't think they would eventually make money from them in the long run.
Just wondering, as far as the magazines go, when will they be coming out with the demo compaired to the release of the game?