I doubt it is anything more than going where QLink currently has 100% of the market.
VA do BNE-BDB 6 or 7 times a week and it hasn't done much to QLink.
They also compete several times a day on BNE-EMD/MOV/GLT/ROK, not to mention SYD-CBR/ABX/PQQ/CFS.
SYD-TMW is about the only route in NSW where QLink has no competition.