This is a nice easy one. First off, thanks for spreading the love. QoD is the most time-consuming labor-intensive thing we do, but we know how much people enjoy this feature and we (usually) enjoy researching and writing the answer.
The answer to your question is easy because we send our emails out through a third party marketing company that tracks all the stats for every campaign. Hence, we can confirm that at the time of this writing, there are 27,267 people signed up to receive the daily QoD email. If you have friends who like Question of the Day, why not suggest they sign up to receive the daily email alert too?
