I don't think it's a "secret". Here in NC they're advertising that bad boy on TV a lot.
The $10 sandwich has 2 chicken tenders, 1.5 oz. of roast turkey, 1.5 oz. of ham, 1 slice of Swiss cheese, 1.5 oz. of corned beef, 1.5 oz. brisket, 1.5 oz. of Angus steak, 1 slice of cheddar cheese, 1.5 oz. roast beef, and 3 half-strips of bacon, writes Sarah Halzack at The Washington Post.