During my search to find the best crosshair overlay solution, in the farthest regions of google, I found a program that was created for business, that, funny as it is, does the job better than mumble, Asus monitors, programs that were created especially for crosshair overlays, and whatever in between. If you're either one of these, or just genuinely curious, you might enjoy looking into this.
There are also others who enjoy editing their game and making it feel more like their own. There are a few out there, like myself, who either hate their ingame crosshairs, don't have one, or have 'Where the hell is my crosshair?' syndrome.