It's hit or miss depending on if you want to buy the game again or not. The only solution they car about is the one that gets them double the money. They don't give a rats fart about people that supported their game from Day 1 by buying it on Steam, only about their own profits.
It's a shame to see what a horrible, scummy company Codemasters has turned into. At least that saves me the money from the GRID pre-order-