I've previously confirmed this with qantas as I've had to keep my mothers points from expiry by using a points transfer from a credit card, they confirmed it was valid activity and when the points were transferred it reset the expiry. The easiest way to see that this is the case is to look at your account and there's a whole section under 'Points earned in the last 12 months' dedicated to transfers from credit cards. It's clearly valid point earning activity, arguing otherwise is just embarrassing.