Quote from Tuborg :So nobody hosting online game? After a quick look at the hosts list (https://www.lfs.net/online/activity), team AA has two servers set to BL Rallycross currently: [AA] Demo Racing and [AA] Rallycross GTI. You can join those servers to find someone to race rallycross with.
You can click: filter empty: no, than try to find some Rallycross lobby and hope it will fill-up when you'll sit there long enought.