Cause Travel, powered by Priceline, builds custom travel sites for non-profits at no cost to the non-profit. The non-profit's patrons buy their travel from the non-profit's travel site and pay the same price they would pay at Priceline or Expedia. The non-profit receives 6% of the gross from sales. Cause Travel supplies the marketing materials for the non-profit to deliver the message to their patrons.