Turning the "I might use it" feeling into cost per use and days idle is a useful reframe, and the honest limits section covers the cases I would have raised. One thing in the G2 rule: because Uses counts the last 30 days, any row with at least one use has a Last used date within 30 days of J1. So E2>60 can only be true when C2 is already 0, and changing the 60 never changes a result, even though the post suggests tuning it. If the idle threshold gets its own cell and alone decides Cancel, with zero-use rows going to Review instead, the knob starts working. A service used every six weeks or so is then not flagged for cancelling the first month it skips.