They probably just stop paying and also don't want to be fans anymore?
http://www.ahsforum.com/forum/showth...highlight=maro
It looks as though he had divorced her at some point in 2009-2010 when his name was credited as Uchiyama in booklets instead of Nomura. At least we know the truth behind this now.
Ryoko Nomura + Maroka Nomura in 2005ish until like 2009 or 2010 where they split and his last name switched back to Maroka Uchiyama.