oras.io uses Stripe to handle payments. Stripe is one of the leading payment service providers for online businesses (learn more here). You have to connect a Stripe account before being able to publish even listings. You can find all instructions under "My Account" - "My Profile" - "Stripe".
Event though you already entered your account details with us, you will have to add it to you Stripe account as well. Otherwise you will not receive payouts.
In your Stripe account you can change how often you would like to have payouts. Find these Settings under "Transfers" - "Settings"