Being one of TA's affiliates I just got this email today:
Twitter has changed their site to make TweetAdder not work. We are working on a fix. In the meantime due to potential of chargebacks and refunds. We have set the system to hold commissions for 30 days until applying to your account. This will give us the opportunity to weed out the commissions that are refunded or charged back. The commissions due today are being held for 30 days prior to payout. You can expect payout in 30 days.
So that doesn't sound too good.