Here’s my philosophy:
My site uses some data for analytics. It tells me statistics, not individual details.
If you sign up to follow my blog or get my newsletters, then I obviously save your name and email address. I also collect stats on open and click rates, which I use to improve my service. If you ever want to unsubscribe, that’s fine, although I hope you enjoy my letters enough to keep getting them. 🙂
I do not sell your information.
And here’s a more official and complicated version.