For example, FHC's aim is to unify different FH communities in a simple manner. FHC keeps you aware of possible events such as scheduled games on servers (oh I dunno, MAYBE ON SKYTTEGRAV FOR EXAMPLE? HINT HINT) and lets people know about new FH-related things through different channels. Surely, it is insignificant little way to shine in the midst of all other sites and such, but it is there for community members to interact with each other.
You can if you wish to have Skyttegrav show up in the FHC's supported servers (showing server details in the main info) in a fashion Hslan is listed right now. Also, FHC can be used when you are scheduling an event on your server and you wish to see people. It doesnt guarantee people come because of it, but at least it spreads the word even that tiny little bit, which otherwise some might not notice that easy.
That's what FHC has to do with Skyttegrav. It is a small and quite insignificant source for news. But why would one leave it out when you want to advertise as much as possible?
Im not pushing it, I am only offering the little things what it can provide you.