I think you might look for some other possibilities of hosting. Personally, I used the possibility of cloud4u and their cloud-hosting with https://www.cloud4u.com/cloud-hosting/gpu/ GPU feature. Thus, it helped me to improve the FPS for all players in Arma 2. But yeah, since the game is slowly dying, it is not enough to have a good FPS on your server. There should be something more efficient and interesting.