Hey Arso! Thanks so much for your feedback! Seeing your detailed thoughts has been really helpful!
Regarding your response to question 2 - yea I messed up in the design mockup 😅 It should've been an AND between the groups so that it'd make sense for the funnel stats. And yes, the range in reality will be much smaller than what I have in the mockup, we're exploring range to further distinguish estimated numbers from exact numbers.
Regarding your comment on "estimated reachable users", I double checked with our engineers, and confirmed that the total number is correctly reflecting total reachable users (and no unreachable users). The reason why sometimes the total number and each channel breakdown number is different is because there are additional channels such as SMS that we're not showing in the channel breakdown.
Thanks again for your feedback!