What is the ruling on money acquired from selling electronic game points for real money, and is its seller or buyer considered sinful?

The basic principle is that it is permissible to sell in-game points if the game itself is permissible, and the points have real, permissible utility, and the purchase is not gambling. If these conditions are met, then it is permissible; otherwise, it is not. Most of these games do not adhere to Sharia regulations, therefore, you should not participate in this project, and you should advise your friends likewise. Lawful and clear sustenance is abundant.