I'm not sure... I'm pretty sure it's just "bye, bye" because it says that you are discontinuing your service.
I also wonder if you happen to find your old magicjack after you discontinued the service, if you would be able to reactivate it again...
Here's what there terms and service says (even though it probably hasn't been updated in forever, I guess we're still bound to whatever it says):
Ownership and Risk of Loss of magicJack Device
You will own the magicJack device, but not the Software included on the device, which is licensed to you under this Agreement for a one year term, and bear all risk of loss of, theft of, casualty to or damage to the magicJack device, from the time it is shipped to you until the time (if any) when it is returned to us in accordance with this Agreement, or the warranty covering the magicJack device, if any, expires.
So they most likely won't give you a new one, unless you get lucky or they've changed their policy.
I have only read about other customers experiences with this and it doesn't look good.
I have heard that they make you pay full price for a new magicjack. Some people have reported being able to keep the same phone number they had before on their previous magicjack, and others have said that tech chat won't let them and says it's not possible.
If memory serves me correctly, most of those people who have said they could keep their old numbers also said they still did not get an extra year added to their old account, despite that they payed full price for a brand new magicjack which is included with a free year of service.
I think they should sell replacement magicjack's and a discounted price that doesn't register a new account and just lets you log into your existing one.
I guess if you ever find yourself in this situation, it would be best to contact tech chat before you register your new magicjack to see if you can keep your old number. If you purchased extra years on your old magicjack (that was lost or stolen), then you probably wont even be able to add those years to your new account even though you payed for it. At least, that's what some people have posted.