Reaching 100K would only require flying 8k per month. A trip to HNL from DC alone is 10,000 miles, and going to any West Coast city (SD, SF, LA, SEA) is 5 k each. Some escorts also do a run on miles to kick up their mileage last minute in order to reach a higher statues.
Jeff Holt (now retired) was 125K on Delta for yeas because of flying a lot from his home in San Diego and also because of only using the Delta card.
Obviously your friends from Bel Ami take the train and Ryan Air and don't fly twice a month like some escorts here in the U.S.