On Sun, Oct 25, 2015 at 1:25 PM, Ben Bucksch <[email protected]> wrote:
> Gervase Markham wrote on 25.10.2015 15:53: > >> On 24/10/15 02:30, Alex Davis wrote: >> >>> Why do we need to ping every time the app opens and we don't just rely >>> on install numbers? We know for a fact that not all installs are equal. >>> If we only optimize for installs, we may ignore that cheaper installs >>> via 45-65 year olds actually have a really bad churn rate, and that >>> despite being more expensive per install, 18-25 years retain much >>> better. In the end, we don't want to optimize ads to drive installs, we >>> want to optimize our spending around acquiring more Firefox users. >>> >> Why do we need data this detailed in order to get a good enough idea of >> churn rates? What if e.g. we pinged on the first open every week; if >> someone didn't open the app that week, no ping. The distance through the >> week could give us a bit of a proxy for frequency of usage. I think we >> could get a good idea of which channels were better, without tracking >> every app open by the user. >> > > We already have this information > * From update requests and addon block queries > * Metrics / FHS > There's no need to add another ping. The plan is to migrate the retention and churn aspects of the Adjust ping to Unified Telemetry (UT), which should be capable of handling those tasks. Currently, UT is not operational on Firefox for Android or iOS, so Adjust is our short term stopgap. Within reason, we expect in-house Mozilla systems to handle as much of these requirements as possible. > > In general, I think we should always be thinking "what's the minimum >> amount of data I need to collect to get a good-enough answer to my >> question". >> > > Yes, that's the right question to ask. > The Adjust pings send a very small set of data, which is aggregated and deleted on the server. Winston Bowden created an excellent summary of the way the data is collected and handled in this post: https://lists.mozilla.org/pipermail/dev-platform/2015-May/010065.html Nick Alexander also wrote up some of the technical details here: https://gecko.readthedocs.org/en/latest/mobile/android/base/fennec/adjust.html > > On top of that, users have a *right* to their data and not to be tracked. > Even if you have useful questions you want answered, you might still not > get them. Agreed, and since Mozilla considers the Adjust collection to be in the same realm as FHR, you can opt-out using the FHR setting.
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