Solved (DBO)

by General Vagueness , The Vault of Sass, Thursday, January 22, 2015, 10:24 (3601 days ago) @ /Sekhmet/
edited by General Vagueness, Thursday, January 22, 2015, 10:47

So during junior high I had a lot of free time. I spent some of it memorizing a bunch of pi (circumference of a circle divided by its radius). I kept seeing some familiar digits in one of the grids but I told myself it was a coincidence. I was checking out the key possibly being looking at the characters in a spiral pattern, starting by going down and left since the cuts went that way, and I looked around the familiar digits a bit and saw another one, and then I looked to the center, and it seemed kind of obvious.

The left grid's crossed-out characters are the first 24 digits of pi.
The right grid's crossed-out characters say, in l33t, from left to right and then down, "go redeem 25 char code on Xbox".
The left grid's not-crossed-out characters say "be sure to drink your Ovaltine".
The right grid's not-crossed-out characters are indeed an Xbox code that added $10.00 to my account.
Thank you very much, Sekhmet, or Rasputin, or whoever.