Hello everyone, I'm wondering if anyone out there has used or is using StumbleUpon Paid Discovery? I just signed up for it because it seemed like an effective and relatively inexpensive way to get my site out there, but I'm really confused. There is a BIG discrepancy between the amount of "paid stumbles" according to StumbleUpon and my site stats. According to StumbleUpon, I've paid for 49 "paid stumbles", but when I view my site stats, there are only 15 referrals from StumbleUpon and 26 total views of my homepage today. That's quite a difference, especially since they claim to only charge for "engaged users". Just wondering if anyone else has used this and could maybe provide me with some insight as to how it works.