Paypal take their commission immediately the money is deposited
eBay invoice you once a month for their commission on all sales (paid or not paid). eBay send you an invoice and deduct from your c/card or paypal (whatever you set up), on a given date, usually about 10 days after invoice date.
if you dont get paid by the buyer you need to open a dispute for Non Payment to get your fvf commission reversed.
