Be very careful! I received a letter in the mail the other day, with garbled information in the To: section (based from a whois of a domain I own that's static now - I recommend getting a service that blocks your whois information to prevent these places from sending you mail). Based on that, I knew right away that they had gleaned my info. and was probably up to no good.
For one, I'm not stupid and my domain is registered with GoDaddy since September of last year. Why would I want to renew my domain through DROA for $30 a year for approximately 3x the cost it is currently with GoDaddy? They also stress you to reply before a certain date, at least 4 months before the actual expiry date. It just makes no sense.