If you buy fifty or more DJCoins then you are entitled to a number of poker chips representing your purchase. It's just a bit of fun and can't be exchanged for anything, but it gives you a physical representation of your virtual asset.
If you buy 50 DJC you will receive five 10DJC chips
If you buy 79 DJC you will receive seven 10DJC chips.
There is no postage to pay.