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Sorry, I should have been more clear: I just dislike the use of "billions!!!" when what should be discussed is either qps (system load) or daily-active users (engagement).

You could guesstimate DAU from qps by choosing a "queries per day" number (e.g., 10?) and assume the queries are done over just 8 hours. That's 1.25 queries per hour per user. Multiplying these terms out, you get ~500k DAU.

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You probably aren't a fan of Carl Sagan then :-) [1]

[1]: https://en.m.wikipedia.org/wiki/Billions_and_Billions

I am! That's billions of a metric that people would agree is "a lot" :).

Billions of searches per year is just a weird metric that obscures what you'd actually want to know.

Billions queries and 500k DAU indicate that the service is used, they communicate essentially the same information.

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