It's about the efficiency of harvesting spare time. If before it took you 20 minutes to set up your tools and get to work, then a spare 10 minutes was meaningless and you might as well watch TV. But if you can click "EDIT" and be contributing to wikipedia in 20 seconds, then you can watch TV for 10 minutes while you contribute for 9 minutes and 40 seconds.
(no subject)
It's about the efficiency of harvesting spare time. If before it took you 20 minutes to set up your tools and get to work, then a spare 10 minutes was meaningless and you might as well watch TV. But if you can click "EDIT" and be contributing to wikipedia in 20 seconds, then you can watch TV for 10 minutes while you contribute for 9 minutes and 40 seconds.