I’ve been testing some advertising on StumbleUpon lately for Cashboard. The numbers have been decent, so I decided to put a little more money into it.

Unfortunately StumbleUpon uses PayPal for their payment system. I made a payment on my account with them 3 days ago. It shows up in PayPal, but not on StumbleUpon. I’m guessing it’s a problem with their IPN notification system.

What’s even worse is two emails have gone unanswered. Has anyone else had a similar experience?

Update (6/25/07 1pm)

Looks like they just needed a kick in their ass. Mysteriously this morning the funds appeared and advertising was back on.

Power of the blog? Hrm….