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This content was created by David Castellanos. This content was uploaded by David Castellanos. This is a YouTube video titled "El verdadero dinero está en la postventa" (created 2023-10-13T01:00:22Z). It contains a Spanish monologue advising installation and service business owners to focus on post-sale revenue: contacting past clients, offering maintenance/upsells, keeping notes, and running cyclical reviews of the customer database to generate recurring income. The speaker recommends sharing this advice with company leaders; no multiple speakers are indicated.










