In Spain, financial transactions are less important than in France. In France, you can literally 'buy' someone else's friendship, while in Spain, you have to uphold certain values to be included in a certain society (cf. the bullfighting 'aficionados'). When Jake helps Brett and Romero to come in touch with each other, he loses his status as an aficionado in Montoya's eyes (149-150, 153-154, 162).