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Like most disruptive technologies, it's not quite clear why Bitcoin / blockchain are better than incumbents, namely credit cards / centralized databases.

At Purse, we use blockchain escrows to unlock value from Amazon gift card balances. This was previously impossible (gift card exchanges can't transact Amazon), and the liquidity premium powers the discount. Escrows and other complex transactions are difficult using traditional payment systems, and we believe that they can be applied more broadly to many other markets.

[wpietri]

Ok, so if I understand you correctly, there are some people who have gift cards and want cash. They're willing to take a substantial hit to do that. And a quick Google search shows that there are plenty of people in that business. But your unique angle is that other exchanges can't handle Amazon cards. Could you say more about why, and how Bitcoin makes that different for you?