I think that cafe collab is not enough to save Nue from getting axe. Some series are sales well but got axe late, example: Ichinose family, Nura,.... Why you think that cafe collab will save Nue? Answer me that question.
Did you just disregard EVERYTHING I said besides the cafe's success?
Anyways I'll try to make it simpler:
1. There are MULTIPLE series that objectively perform worse than Nue, and a few more that debatably do as as well.
2. I did not say "The cafe will save Nue". I said that it was a huge success for the series, and because of that Shueisha now knows there is good merch potential coming from the series.
3. You are basing the possibility of an axe for Nue on the bad ToC ranks. As I've said, the ranks recently don't mean much (see what I said about Kagurabachi, Yozakura and Undead Unluck. I'll throw in Witch Watch as well as it got bottom 1 a while ago despite the anime being announced already.)
4. The series is not rushing the story.
5. I am not saying it is IMPOSSIBLE for it to get cancelled in the future, I'm saying that it should reach chapter 100 (and the second anniversary) without too much worry.