Again were back to the point of an individual that did something wrong. I'm sure it is not their business policy to do such a thing. In any event, what I am talking about with starting this post is that these malicious copycats get new dies made through a different manufacturer.
In the case of taking possession of your design's dies, a customer is welcome to have the dies given to them. The reason why most manufacturers' typical policy is to keep the dies is that once the dies leave their possession the dies are susceptible to damage, especially in shipment. They are easily prone to scratches and dings that render the die useless for re-orders. Any small blemish on a die is a large blemish on the final product. Also, the shipping cost is enormous since the dies are large and very heavy. This now makes the entire coin order cost much more than needed. Then if you want a re-order, you now have to wait for the dies to get back to the mint making order take days longer than needed. If it is a matter of maybe having the coins made at a different mint for whatever reason, then you have to find out if the dies even fit their press machine. Most of the presses are custom made for the manufactures applications and how each mint feels what press design is best for production. Also, the other mint may not want to use the dies since some companies don't want to take the chance of possibly producing an inferior product if the die came from a low grade mint or die maker. Etc., etc...