It seems like every reality show involving a married couple eventually renew their vows. The producers run out of ideas and say lets take the whole family somewhere and the couple can renew their vows. We can make it a four parter and cross promote all our other shows. Say Yes To The Dress being an example.
The Duggars did it, Jon & Kate did it, I think Carmen and Dave did it and now Tori and Dean are renewing their vows. So far this whole vow renewal thing has only worked for the Duggars. To everyone else it was just a free trip somewhere and a short wait to divorce court.
With all of the trouble Tori and Mrs. Tori have been having you wouldn't think they would want to press their luck with the vow renewal thing.