That's something to post under this category
http://www.wowinterface.com/forums/f...splay.php?f=18
or maybe PM a moderator about, not much other authors will be able to tell you except common sense stuff.
Maybe the addon has a restrictive license that doesn't permit forks?
Maybe it has an active maintainer? etc
Fan updates are tolerated under some circumstances afaik, but not really supported because it can get out of hand rather easily: fan fan fan's update