There is a maximum theoretical length and the sphere actually allows you to wrap around it, Rod of Asclepius style, until you get there - picking up an apple on

There is a maximum theoretical length and the sphere actually allows you to wrap around it, Rod of Asclepius style, until you get there - picking up an apple on each cycle. I suspect it's not more than a few hundred segments though so those ~600 submissions are probably someone gaming the submission with a forged score.