I do not think that Coinstar has any right to use the word cash if they are going to let offers expire after 24 hours.
Last week I wanted to exchange my coins by using the "Cash Voucher" atm. However, the problem is you can only use your original money for 24 hours.
Basically, if you exchange your metal coins in electronic cash, you have to use in one day. There is no example of it around the world!
Coinstar should be more honest to its customer because what they call is not cash it is an e-gift card.