This does not work for CS;GO at all, i turned it on with a hotkey, noticed nothing, still was getting killed as soon as they saw me, alt tabbed saw "lagging" and big X on the icon, tabbed back into the game, played for 1 minute with program running on "lagging" eventually got "connection probles" in cs:go, alt tabbed back out and saw that my internet connection had reset (little computer icon in the bottom right had yellow exclamation mark on it)
IT DOES block internet connection for my browser tho, enabling it and trying to browse simply gives "no internet connection" window, guess CS;GO has this patched or something.