How does Sabre make its money?

Could you elaborate on the revenue streams that Sabre relies on to generate its profits? Do they primarily derive income from the transaction fees associated with their payment processing services, or do they also have other significant sources of revenue, such as providing technology solutions to the travel industry? How has the shift towards digitalization and online bookings impacted their financial performance? Are there any new revenue streams that Sabre is exploring to maintain its competitive edge in the market?