We used the Adster service for a few months on our site. Things seemed to be fine until it came time to payout. Minimum payout is $5. We requested a payout of everything currently due, $83.xx, in Feb of 07 before the last Wed of the month as instructed and as of May 2007 we have yet to receive a payment from them. I have contacted support dozens of times and been told that my account has been forwarded to billing only to never hear anything else from them. About a week ago I received an email from Adster that said they were having problems with the new payment system that they had recently changed to and that payments would be sent out on Apr 30, 2007. Its now May 8, 2007 and still nothing. No payment report in the online stats, nothing. I contacted support again and they assured payment would be sent this week. For those that were considering using the Adster service I would strongly recommend that you DON'T USE IT!