Unfortunately, even "mainstream" media outlets have come to the conclusion that tabloid is where the money is.
And I doubt they just one day thought, "Hey, we haven't heard anything about OM for a while. Call her up, and let's invite her on." OctoMom is, I understand, going to have a reality tv show. This was a publicity tour thing. Probably the networks are somehow connected, and this is an "ad", in effect, for her show.