You can give your players incentive to do things, but if it’s not the incentive they’re looking for they will probably demonstrate it by their in game actions. Some examples of player incentives include:
The Biggest Game Ever
How did this niche racing game make a gameworld so massive, and why is that a big deal?
The Best of 2014
My picks for what was important, awesome, or worth talking about in 2014.
A look back at Star Trek, from the Original Series to the Abrams Reboot.
What was the problem with the Playstation 3 hardware and why did Sony build it that way?
Grand Theft Railroad
Grand Theft Auto is a lousy, cheating jerk of a game.