BTW, you might be interested to know there are other drop-catch services, for example: DropCatch and Pheenix.
One more thing: a great many dropping domains are available at GoDaddy auction - before they go into redemption! This depends on the registrar the expired name is registered with. Not sure whether Register.com is part of that arrangement.
You'd have to leave a credit card on file, that will be charged in the event they catch the domain for you, or you win the auction (in case of multiple backorders).