Indeed - it is worth wondering what all these Qantas group customers are advocating.
They could be advocating how good the QF service is, their products are or advocating never again to fly Jetstar, how worthless their QFF points are, how difficult it is to redeem QFF points, how well they do priority boarding?
Without knowing the subject matter and the tone of the QF customers advocacy (negative, neutral or positive), its a meaningless metric/statistic in isolation.