Listing acknowledgments on CV
I've never seen "mentioned in acknowledgements" on a CV, and wouldn't know how to evaluate them if I did see them on somebody's CV.  Acknowledgements are often pretty random and arbitrary in their threshold, and can often indicate a very small involvement indeed (e.g., "Mary was eating lunch with us one day when the project was being discussed, and happened to say something useful").  This is different than something like service (e.g., reviewing), which typically has fairly well-defined investment in time, and is a known burden that needs to be shouldered by volunteers across the community.