What is the ruling on using a method that relies on two devices to obtain points faster and convert them into money used to purchase games and items online, knowing that this money is not used in real life?

If the points have significant monetary value, then it is not permissible to open another account and register from it as if one were another person using the links, because this involves deception, trickery, and devouring people's wealth unjustly. It is a condition for the permissibility of earning points from promoting the program that the program itself be permissible, not inviting to vice, and not containing anything forbidden.