Some people do mileage runs to gain or maintain status, some do them to reach other goals such as bonus miles for new routes, etc. I was going through some of my old things this weekend and was reminded of my first one.
In the early 80s, TWA was running a special, fly 5 flights within a certain period of time, and receive a free domestic first class ticket. I was already planning a trip back east with a friend, and needed one more segment to qualify, so I flew SFO-LAX-SFO one night after work. I even got an L-1011 both ways, with the return flight nearly empty.
Right after receiving my certificate, TWA had a fare sale between SFO and JFK, so I sold the certificate to a mileage broker for $525, that covered the cost of the ticket to NY and my share of the hotel that weekend. The miles I earned for the LAX and JFK trips were a nice bonus on top of it all.
If you've done a mileage run, what was your first one and why did you do it?