It is sponsored by Dr. Scholl's again. I also noticed it was repainted. (Well, painted on top of by a thinner brush, so you can still clearly see a wider fading line)
Honestly, my guess is that Dr. Scholl's came to Six Flags with the sponsorship, and it was up to each park to decide where they would paint a line to. Safari is just the obvious choice for us, but I don't think the idea for the line came before the sponsorship.
SFNE's goes to the waterpark. Lol