Your servers are being blocked by any 3rd party masterlist, like Ouned's Master List, along with Boy's.
This normally isn't an issue because of ravensoft's masterlist, but as we know it has been down for quite a few days now.
^^ This is the master patch, bringing server list back
^^ This is Boy's serverlist
I know this isn't really an issue for some, because they connect via xfire or they already have the IP in their favorites or whatever.
And I know that this has been discussed with Epic because only like 3 people showed up I think (a result in the master being down).
So whoever is in charge of SoL servers, you should highly consider changing this so people can see the SoL servers
just a suggestion.