How does the online travel agency (model) work in terms of the revenue?

for e.g for cos. like orbitz, travelocity etc. Do they get a % comission for every hotel booking they get? Do they get any banner ad revenue?

Ok i can tell you about traverus travel network and how the % commission work.When you are a Referring Travel Consultant (RTC) of Traverus Travel for every booking that occurs on your site you earn 20%to 65% and if you are a Certified Travel Agent (CTA) you will wil 75% of every booking.

If your interesting in joining you can email me at dario_1-6@hotmail.com / idonia_buka@yahoo.com. You can also visit my website to join http://daritravel.traverustravelnetwork.com. :)