People like free stuff. People also are more likely to buy something once they try it. So, it makes sense that offering free, trial-size samples of everything from laundry detergent to shampoo is a frequently used arrow in the sales-and-marketing quiver.
When it comes to postal products that don’t cover their costs, the U.S. Postal Service finds itself in a no-win situation. The law that governs the U.S. Postal Service, the Postal Accountability and Enhancement Act (PAEA), requires the Postal Service to make sure all products cover their direct costs. But it also caps the price increase on market-dominant mail classes at the increase in inflation.