I got lucky to see this typo (hopefully it was a typo) and snap a couple shots before 7-11 got wise and took the signs down. The advertisement stayed up for only a few days at the 7-11 downstairs from our apartment, but I saw the same signage for weeks at several other 7-11s closeby.
If you look carefully, you'll see that the new seafood burger at 7-11 has quite a surprise for you! I mean, how exactly do you promote the new "Shrimp, CRAP stick, and seaweed burger"? Eat up!