You are correct. It is always subject to availability, and doesn't matter if you already have a room booked or not...you'll still be at the back of the line waiting just like everyone else.
These leaks don't really serve a purpose other than easing some stress, and in some cases doesn't even do that. Knowing in advance doesn't save you anymore money, get a room booked any faster, or get you to the front of the line anymore than someone who finds out on release day and calls to book.
One silver lining is that in the past, Disney has extended some dates by a date or two a few weeks after releasing a
free dining offer. This generally comes as a total surprise as nobody is really out there looking for it...but a nice surprise none the less.