Thanks for clarifying, and for sharing some interesting data points. Again FWIW, what you've described there seems a lot more reasonable to me than the raw 2/week rate without as much context did.

I think the key thing that didn't come across before, at least as I read your previous post, was the "when the user wants them" qualifier. If you're sending material that is useful for genuine users and carefully timed for when it's likely to be of interest to them, that's great.

The ones that wind me up are the businesses that have your e-mail address because you tried their site for ten minutes or made a one-off purchase from their on-line store and then think they're welcome to send you their latest "special offers" every few days for the next several weeks with a bit of trivial customisation based on what you tried/bought before.