Several legitimate "play-to-earn" or reward platforms allow you to earn coins by playing mobile games or completing surveys, which you can then redeem for Steam gift cards to purchase the game.
If you cannot afford BeamNG.drive (currently on Steam), consider: beamng drive steam key free
: Occasionally, keys are given away during events on the official BeamNG Discord or forums. Safe Ways to Play for Free (or Cheap) consider: : Occasionally
Often slightly cheaper than Steam directly and provides a Steam key. ~$21.00 - $24.00 beamng drive steam key free