The parents show up on one or two national TV shows every few months. It's enough for supporters to say that they are keeping Lisa's face out there, but it's not enough for the general public to remember Lisa. That's the whole idea. Since November 1, the parents have made one appearance on Dr. Phil, one appearance on Today, and one appearance on Megyn Kelly's Our America. IMPRESSIVE!
As for the comments about how other suspicious parents aren't doing anything to keep their child's case in the spotlight, everyone is different. No one deals with the media the same way, even if they are all guilty of killing their children.
The parents know that a balloon release is not going to get much media coverage, eight months later, unless they paired it with a sit-down interview.
I just don't get it. Why don't they go on national TV more often? Especially in a case like this, where Lisa is a baby, so if there was an intruder, there's a good chance she's still alive. Get an age progression done, and get back in the spotlight? Or are they worried about drawing too much attention to themselves?