The last official word I heard from the SD regarding was --if you book through certain travel agencies, kids eat free is included.
At that time, Expedial and Travelocity were offering it with their SD bookings.
Of course that was more than a year ago, so, am not sure anymore. But, I do know that as of last June, there was no "kids eat free" policy in general.
The Continental breakfast and evening snacks are for Club level guests.