I submitted two scores and got nothing, but I didn't reach the end.

It doesn't give out sP full stop. The 'send score' button is there purely for the achievement (and originally for progression in the plot it was part of).

Oh, and technically for Major Drills’ quests as well. xD

Huh, I never noticed before. Thanks!

It would be nice for it to give out SP 10 times a day since it's so addictive, after I finally got to 2048 I don't touch it again except for when Drills asks me to.