Outside a stadium, the game begins before the first pitch. Vendors offer food and drinks to fans gathering for la previa, the social time before an event. Their work is part of an informal economy: a network of buying and selling that may operate outside some formal business systems. This description does not mean that every vendor works in the same way or has the same relationship with local rules.

The approach can function as both marketplace and meeting place. A familiar call may help a seller stand out, while a shared snack can become part of a group’s game-day ritual. Vendors may depend on foot traffic, weather, event schedules, product costs, and their location. For that reason, a busy entrance does not guarantee that every seller will earn the same amount.

The example above shows gross sales: the total value of items sold before costs are subtracted. It is not a measure of take-home income. A fuller account would ask about the cost of goods, transport, permits where applicable, payment fees, and any agreements with other businesses. Without those details, a sales total alone cannot explain a vendor’s profit or working conditions.

Mobile payment may offer another way to complete a purchase. It can be convenient for some buyers, but access to a phone, connectivity, fees, and customer preference may shape whether it is useful. If mobile payment adoption rises at the same time as sales, that timing does not prove that one caused the other. Researchers would need more evidence, including comparisons across sellers and information about costs and transactions.

The ballpark approach is therefore more than a row of stalls. It is an evolving social and economic space where entrepreneurship, routine, and community meet. Studying it well requires both attention to cultural meaning and careful questions about how the business works.