To get free _airplane_ pretzels you need to first be on an airplane, which means you need to buy an airplane ticket, which costs hundreds. Similar with free be

To get free _airplane_ pretzels you need to first be on an airplane, which means you need to buy an airplane ticket, which costs hundreds. Similar with free beer. You need to do _something_ to get the free beer. It will probably cost less than the airline ticket, but it will still cost.