If they state as an explicit principle that no addons/studies are actually enabled unless the user opted in, then I’m going to give them the benefit of the doubt that if that happened to users that did not opt in, it was a terrible mistake (I.e a bug).
I can tolerate bugs, much more than I can tolerate sneaky app behavior. But I hope the statement about explicit opt-in will be repeated, and this will be explained.
At first I thought it must have been users that explicitly had opted in, but with so many users claiming they haven’t, it seems unlikely.
The next possibility is that preview versions have things opt-out instead of opt in (because in preview versions you need more data from users - typical for closed alphas etc) - but then this should be very clearly explained on download/install.
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