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:
Starcraft 2: Rush Analysis
I write a program to simulate different strategies in Starcraft 2, to see how they compare.
The Biggest Game Ever
Just how big IS No Man's Sky? What if you made a map of all of its landmass? How big would it be?
Project Button Masher
I teach myself music composition by imitating the style of various videogame soundtracks. How did it turn out? Listen for yourself.
Trashing the Heap
What does it mean when a program crashes, and why does it happen?
Good to be the King?
Which would you rather be: A king in the middle ages, or a lower-income laborer in the 21st century?