It got shut-down because no one played on it. Constant resets and switching didn't exactly help with that either. Move on from Arma II DayZ mod switch it up to Arma III instead, I still play Arma II from time to time but mostly on the CCG Wasteland War Chernarus 1 server (add me on steam we can play sometime) it's a hella lot of fun.
Standalone isn't that bad it's came a long way since it's early days of being full of bugs. I find it runs a lot smoother now.