Banning proxies is like a Sisyphean labour. Endless work. I am aware of the fact that everything can be spoofed but the problem did not exist for very long time. There must be ways to improve the protection, make it harder for reverse engineering etc., I don't know. Catching new proxies every single day is a really frustrating job. It's like part time job and you can't react immediately so players keep abandoning this almost dead game.