Travel writer Ben Schlappig uses something called "mileage running" to accumulate lots of travel miles.
Mileage running works by collecting miles on cheap flights and spending them on expensive ones. Over a week, Ben might take over 30 discounted flights. They only cost him $800 and he'll earn over 62500 air miles. He then uses those miles to buy a first class ticket to Japan, which would have cost him $13,000.