Could someone please explain in very simple terms what CCA's...

Could someone please explain in very simple terms what CCA's business model is. Are they looking to offer BNPL to individuals or to process payments on behalf of merchant businesses/financial institutions or make it possible for a company to have its own branded mastercard eg Qantas Mastercard. How significant is being a mastercard processor? I really can't get my head around what they are about, where their revenue comes from, who their competitors are... even after looking at their website and announcements.