Two balances, with a waiting period between them.
PENDING
Commission earned but not yet cleared. It sits here for the holding period specified in the terms.
The holding period exists because orders are sometimes refunded or cancelled shortly after being placed. Paying commission immediately would mean reclaiming it afterwards, which nobody wants.
AVAILABLE
Cleared commission, ready to withdraw once it reaches the minimum payout threshold.
WHY PENDING COMMISSION SOMETIMES DISAPPEARS
The referred order was cancelled within the money-back period The order was refunded The payment was reversed or charged back The order was found to be fraudulent The referral was found to breach the programme terms
This is not a deduction from your earnings; the commission was conditional on the order standing.
WHAT TO EXPECT
A proportion of pending commission will not clear. That is normal across all affiliate programmes. Judge your results on cleared commission over several months, not on pending figures.