They did a similar thing with Gran Turismo (Better than Forza my opinion, please don't kill me) as well, I think BeamNG deserves a hotwheels linup of cars, as it would promote the game, but personally there needs to be more super cars, and just more cars in general, just my opinion. --- Post updated --- As sad as it is, you have a point, in my opinion Forza isn't a good racing game, yet when turn 10 release a new game it's promoted literally everywhere,yet actual good games like beam get hardly any.
You can easily just 3d-print a modified BeamNG car model, make clear plastic cut outs for the windows, glue it all together and voila!