Couple of things
This is a direct response to the people who buy/melt LTI concepts with credit to get buybacks. Personally, I think the easiest thing would be to remove gifting of items bought back, and then allow unlimited credit repurchase from your buyback pool
In other words, it’s just like a purchase with store credits, even if you use new cash. Then increase the promotion to a full month to allow people to make their purchases in concept if they choose to do so. Warbond could still get a small discount, but they could close the gap.