It's not free for everyone going to WDW if that's what you want to know. You MUST book the special package when it's offered (last year April). The package requires you to pay rack rate room price at a Disney resort, plus a ticket for everyone in that room--the exact type of ticket (some of us bought one day ticket and upgraded it to what we really needed). Then the DDP is added to your package, but you don't pay for it. You must buy the special package in order to participate in the free DDP. It has been offered 2 times now and always during hurricane season (mid-August and most of September). Our UK friends have already been offered the package, but here in the US, it has not been announced yet. There are other restrictions too, like maximum stay 10 days, no splitting between resorts unless you buy 2 packages. Everyone registered in your room must be on the package. Even some folks have reported that everyone in your party must be accounted for at check in so that you can not ADD someone to your party that doesn't exist.
There are some new restrictions on the UK package, like length of stay tickets and some minor things like no desert on your counter service meal. We have no idea if these restrictions will be on our packages too, so we wait.
If you book a package, you have to make a $200 deposit (per room) and the restrictions for canceling are a little different than a room only reservation. You have 45 days before arriving to cancel for a full refund. AFter that the rules change. Insurance is encouraged because, afterall, it is hurricane season. We were lucky this year, but never know about the next year.