Someone building hours to get, as quickly and cheaply as possible, the total number of hours needed to meet some target. Once they reach that target, they intend to leave.
The hourly charge should cover the maintenance they bring forward, but there's still the downtime when others can't fly.
Members who fly a lot, but are not aiming for a target, nor intending to leave, may be annoying, but sort of tolerated. (I'm in that situation, and have been for almost 29 years.)