But it seems like all of the major social networks are determined to send you one anyway:
To be fair, I actually like the Quora one, because it features interesting information that I wouldn't have thought of. The others just regurgitated information I would have either kept up with by logging in, or provided information on popular stuff, which I don't really care about. And I didn't mention the Google+ one, or the Facebook one because I turned those options off from the very beginning. This should be a feature that you should deal with at sign-up, not five months into using it.
I just checked my Pinterest account - apparently I'd already checked the "off" option for the weekly digest:
Funny, I could have sworn the same thing happened with my Twitter digest, too.