I think there might be greater importance placed on the activation of the offer rather than actually using the offer (which is a bit odd). Quite a few times this year I activated the woolies liquor offer, but then didn't actually make a purchase, however each week the offers kept coming. The first time I didn't activate it seemed to be the trigger to the offers stopping. I wonder how long my punishment will last for
After not getting any for aeons, I finally got one a few weeks back, which I was even able to use. The next week I also got one and activated it, but was away so not able to use it at Woolies. Since then, back to nada.
Not definitive, but it doesn't seem like activation achieves better results than usage.