The secret track hidden in the script on becausetheinter.net was discovered by /u/peepsie112 on reddit. Here is the post describing how they found it. The hidden file was an acapella that lined up with the last track on K A U A I. It was confirmed by a tweet from Childish Gambino.
The Curse of Curves - Cute Is What We Aim For
find someone who sees both the sun and the moon in your eyes
someone asked for my avi pic
Credit: pandabearjayy (yall should follow)