This appears to be part publicity stunt and partly sincere. Either way, it shows the problem pro SSM people are going to have with polygamists. SSM proponents made a big deal out of two people in love not being denied the right to marriage. "We're in love" seemed to be all that was necessary for two same s@x people to have the ability to get married. So how do you deny polygamists now?
http://myfox8.com/2015/07/02/same-sex-marriage-decision-prompts-polygamist-to-seek-marriage-license/
http://myfox8.com/2015/07/02/same-sex-marriage-decision-prompts-polygamist-to-seek-marriage-license/