For sure, the issuance of the jacket charm is really very inconsistent and double standards.
From what I have gathered, in Singapore as confirmed by gaga and my SA, there is a min spend amount i.e. SGD 2000 in order to get the jacket charm. This is on per item basis. Meaning you cannot even have a few purchases that total to the required SGD 2K just to have each item wrapped with the charm. The charm will be tagged to the item that costs SGD 2K.
However, in other parts of the world, such as Hong Kong or even Canada / States, there isn't any required spend amount for your item to be wrapped with the jacket charm.
Then, as mentioned by hananiki, SA will give if you request.
This makes me feel why can't the policy be standardized across the world! Why accord a minimum spend amount in SG while it is not required in other countries?
Maybe TPFers from other parts of the world can report if there is a minimum spend amount required?