As there are quite a lot of people who like to experiment with different combos, it should be possible to get those together for some racing events. Having all these people join the same server is a serious problem.
Perhaps it would be best to set up a 24/7 server or two that offer
- different selected (not random) combos for 12/24/xx hours
- a website / forum to vote for the next combination
- not-so popular combinations, and never one of the popular ones
- statistics per day and / or driver to make it even more attractive (best race, fastest lap, ...)
Something like a one-day racing event, every day
An official lfs world racing server that stayed on top of the list would be perfect