FreeBSD may have less then 1% of server market share but FreeBSD drives a large amount of network traffic. For example FreeBSD runs the open connect CDN that Netflix uses and that accounts for almost 32% of North American downstream traffic [1]. Limelights edge CDN nodes run FreeBSD and Limelight is one of the Bigger CDN companies out there [2]. Juniper routers are FreeBSD based and are the second most used routers after Cisco. There's plenty of other examples but FreeBSD may not be widely deployed but it serves a significant amount of the worlds internet traffic.
I know not a lot of people are using FreeBSD, but combined with OpenBSD I am pretty sure there are more than 1%.
Edit: Turns out it wasn't a lie.... at least in terms of Web Server usage... FreeBSD has less than 1%.
Sigh.