It did prior to the early 2000's, I've read (but cant find the source) that they changed the manufacture to reduce the number of nitrotessamines to be in the same range as the swedish style.

I think you're referring to nitrosamines, and according to Robert Nilsson who is a professor at Stockholm University, there is "no proof of correlation between snus and cancer"[1] and indeed in 2002, the warning labels had to be changed,[2] and today "only" reads (my translation): "This tobacco product harms your health and is addictive", which is a far cry from the EU mandated warning on cigarettes that goes more like "Smoking kills", with some variants.

[1]: https://www.dagensmedicin.se/artiklar/2012/05/26/snus-bor-in...

[2]: https://www.snusbolaget.se/snusjournalen/snus-och-halsa-del-...

I'm sure that the risk of cancer isn't negligible, but again, spitting is not something that users of portioned snus do, the bags are normally discarded way before they turn runny.