I think "a quick-returns policy" means "with low net margin, you can make more profit by selling more". "returns" seems to mean "profit", then what does "quick" mean? In a short time?

pr87)The number of low-priced, or budget airlines is increasing contantly because of changing trends in commercial air service...The reason of reducing the price of the tickets is a quick-returns policy. Decreasing prices due to reduction in operating costs...