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I’m aware there are problems with the way their survey works, but I don’t see how that’s the case…
To me it seems like it’s done on a monthly basis by selecting a random pool of users and prompting them to participate by collecting stats at that moment, only once they opt into it.
AFAIK the data is not aggregated over a certain period of time (i.e. “a year”)
Hmmm, now I get it, thank you!