While I don't know what the number of active users is either, let's not start another rumor on faulty logic. We already have too many people running around saying things that are not true.
Here is just one example of the faulty logic. More than one account sending to the same address.
Maybe the address is a payment place for a seller of goods, or a bot account. Or in my specific case, a trading account I share with my husband. You can't trust assumptions made on assumptions.