Several people with some form of FreeBSD commit access (including past members of FreeBSD Core Team) work for Facebook. FreeBSD was at one point (and may still

Several people with some form of FreeBSD commit access (including past members of FreeBSD Core Team) work for Facebook. FreeBSD was at one point (and may still be, I haven't checked in a few years) used in the bootstrap process for FB's ISP-hosted cache clusters (because potential GPL headaches IIRC). It's also useful to test network protocol implementations across multiple platforms (e.g. Linux + FreeBSD) and can be handy if you are working with a standards body that wants to N>1 implementations of a protocol.