Mturk is the ultimate example of a boss who uses intermittent reinforcement to keep us addicted to working.
MAYBE we'll make all the monies today.
MAYBE we'll end up chatting all day in the forum cuz there is nothing to do.
MAYBE we'll get home in the late evening after the kid's activities and just want to chill only to find $13 of work in your queue that, thankfully, only took 45 mins to complete.
(I always tell myself I'm turning off my pandas when I leave the house for a bit but I just can't...just IN CASE there is a decent payout like last night...sigh...)