What sales practice did Cyrus McCormick and Issac singer have in common that helped them sell so many products?

Cyrus McCormick and Isaac Singer both utilized aggressive marketing strategies and direct sales techniques to promote their products effectively. They recognized the importance of demonstrating their machinery in action, which showcased the efficiency and benefits of their inventions to potential buyers. Additionally, they employed a network of sales agents and offered financing options, making their products more accessible to a broader audience. This combination of demonstration, personal selling, and customer-friendly financing was key to their sales success.