OK, so here is what just came to my mind. I know the word has been thrown around monotonously, but here is where BeamNG needs to go through with it. Multiplayer is a wide perspective of Steam, on of the main authorizers of BeamNG. So here what I was thinking. Make a system on BeamNG to where you can play with friends, scenarios, open world, and demolition derbies. Please, do this so people can have fun with their friends. It may also help your game!
Online is pretty much impossible for beamNG and the game isn't optimized enough for split-screen at the moment, however I do feel like there is a high chance of getting split screen sometime in the future.