Well do you want useful stats or not /s

But seriously, a lot of opt-in (that never get opted in to) data is insanely useful for developers, but it has such a bad stigma that we never get anywhere close to the amount of usefulness a larger dataset could provide.

I like the way kde does it. On first install it gives a slider with how much analytics you want to send. I just do all of it because I trust KDE, but it's nice that it asks you. They probably have some pretty good data.