Right, the whole "additive free" idea was actually the selling point for me. Since today was significantly colder than it has been for most of this week up here in Maine (and me in shorts because I couldn't be bothered to look at a forecast this morning, apparently), rather than smoking my cobs on break at work today, I smoked my AmSp organic RYO emergency stash. With a pinch of McClelland's Blending Perique thrown into the pouch and shaken vigorously.
The only thing I've figured out for sure is that the American Spirit RYO Perique Blend contans perique. Everything else to me is just theory.
But on another note, as far as burning nails goes, Spirits seem to be the lesser of MANY evils.