Pretty straightforward, here's Neilogical's video on them. Also, if you want to try them out yourselves, go to the App/Google Play store and look up Beamng.
Because the game has a large child audience that may not know the difference. Also, these mobile games are using BeamNG screenshots and the like without permision, tarnishing the reputation of the real product for the more gullible (who are probably the bulk of people who look at these apps). Think of Deadmau5's Ferrari. No one would ever think that was factory, but Ferrari sent him a cease and desist anyway because it affacts brand perception.
It would be interesting to see an honest take on a BeamNG clone, preferably with some fresh concepts so it's not just a shameless clone. Clones especially ones that innovate are great and can be really good for a genre, I mean imagine if we didn't have clones for things like DooM or Grand Theft Auto. Unfortunately with these games, we're kinda seeing the bottom of the barrel, which tends to be the case for a lot of mobile gaming.