It is not my claim that any online store does an effective job of policing canvassing, only that they all attempt to do so. No crowdsourced online review source is trustworthy. But they're untrustworthy because of canvassing.

I'll not also that soliciting a review of an app is not quite the same thing as organizing an effort to get a huge directional shift in reviews.

Maybe more tangential, but isn't that the app itself asking, like a gatekeeper? I think if Apple generates that message or its triggered, then it's one-shot - if the user says "No", it will never be seen again (to be clear, to me and most, this is desired behavior).

So instead you have the app asking things like this, or "can we send you notifications?", and so if you say no, it can ask later, and not trigger the OS interaction until just-in-time.