I went on Quora a while ago and answered a few people's questions, mostly about the Stanford CS department and maybe a couple about Django or AI or something. I haven't been back on the site since - I haven't gotten any emails from Quora saying "you should answer this question" or "these people liked your answer" or "this discussion might interest you". I'm probably the kind of person they want on the site, since I actively like answering questions and helping people, but they're not doing much to keep me on there.
A lot of that stuff shows up on the home page, if you're looking at it; you get notified for upvotes or "thank you"s for answers, and the questions that show up there are the ones that it marks as being of interest (though that seems to be based solely on the topics you're watching).
The email notifications are a lot more sparse, presumably by design (to avoid drowning people in the stuff). A weekly summary (upvotes, thanks, and particularly active topics of interest) might be nice...
