Fallen Earth can be set up, started, and done while you're logged out. Come back after a certain amount of time and you've got a new vehicle and a load of XP. The newly-launched Glitch is another example -- you can learn your skills while you're doing other things in game, and learning continues while you're logged out.
There are various other methods set up by developers here and there for players to advance while they're afk and logged out. On one hand, it makes quite a bit of sense. If crafting a vehicle in Fallen Earth takes over a full calendar day, for example, it can seem a little unreasonable to expect a player to sit there and work on it the entire time. On the other hand, many players argue that it's unreasonable to reward players for not playing the game.
What do you think? Hit the comment button and let us know!