I have been curious about how sweeteners in snuff actually affect the experience of nasal snuff. Just taking impressions from forum posts it seems like some would argue that sweeteners are only added for snuffs that are also taken orally, or that they only affect drip, or even that scents associated with sweet foods give the impression of sweetness. I haven’t found a lot of information about this outside of discussions specifically about snuff. There is a study that I’ve seen reported once or twice.
https://whyy.org/articles/sweet-taste-receptors-in-the-nose-tell-immune-system-when-to-kick-in/
So it seems that there are receptors in the nose and airways that do detect sweetness, but the articles do not address how this translates to perception, only how the presence of sweet or bitter elements in the nose can suppress or trigger an immune response. I don’t know that this means that we can actually “taste” sweetness in the nose in an enjoyable or meaningful way.

I was hoping that some of the more experienced snuff makers in this forum could share some knowledge. Personal experience as well as reference material would be welcome.

I have some McChrystals Stargazer which has noticeable sweetener if sniffed too far back. Toque absinthe seems to have the same sweetness albeit less intense. I dont like it, but if I keep it on short sniffs to the front of the nose the sweetness is unnoticeable.