I think there is indeed enough nicotine in snus (depending on which manufacturer and size) to, ah, satisfy a vaper.
Thunder X ICE extreme large portions made me puke, once. I wasn't really on the lookout for nic overload. I made it to my bathroom and like, well, to my bathtub which is worse than some OTHER potential places, frankly.
BUT, I to this day will give myself a break from that particular snus after the first half hour or I will straight up PUKE.
While some nic sprays may well be less, um, flamboyant than puking on the floor in front of your Judge from the "accused" box I am also 100% convinced that there is MORE than enough nicotine in them if you get the right brand and size.
The ones I use at work are nowhere near that potency though. For one, I CANNOT just spit what looks like a dead slug in the palm of my hand and play it off as "my gums needed leeched" and for two, two high large potency snus and speech causes me to dribble black goo from like, the corners of my mouth. I think it has something to do with my dentures but WHATEVER it is, I can't be HAVING THAT.
I think every like, harm reduction method has an Achilles heel and you gotta mix and match.
But ONLY snus has made me puke, and I've been up to 36 mg/ml before (in MTL setups but still) after my just after my first anniversary like, uh, relapse. Yeah. That didn't make me feel ill at all, but it did work.
Anna