I think its because you cant use limonene to freeze precipitate the dmt out.
Limonene is good for salting out using fumaric acid saturated ipa (FASI) which results in dmt fumarate (a salt), which is good for oral administration but not for vaping.
Limonene will pull alot of alkaloids and results in a full spectrum product.
Dmt fumerate can be converted to freebase resulting in jimjam or jungle spice.
Naptha will pull regular dmt, it doesnt pull as much of the alkaloids but is fine for regular spice.
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