For my debut: 96% downloaded; 50% reviewed on Amazon, 62% on Goodreads; 54% on Storygraph. I kept track of how many reviews on each platform. I stopped capturing metrics about 3 weeks later so if someone downloaded an ARC, read it months later, & reviewed I don't have that in my data. For my 2nd: 93% downloaded; 42% left a review on Amazon; 67% left a review on Goodreads; 18% on Storygraph. Again I just tracked this # of reviews on each platform.