AFL fans try to belittle rugby leagues four nations... but at the end of the day the fact Rugby League has four competitive nations shows the international profile rugby league has. And competitive National teams is what AFL could only dream of at the moment.
Rugby League also has advantages over AFL in many overseas markets. North America for example has NFL and Union playing grounds already set up which Rugby League that can easily be played on. Mean while cricket is non existent there, so AFL don't even have field dimensions there to play on and grow their code in the U.S.
AFL will always be seen as a code that is too alien for many countries and seen as just a novelty.
League also has a culture that Americans would relate to. Big head on collision tackles, line breaks, cheerleaders, conversion kicks, trys which are called touch downs there. The very culture of Rugby League is what Americans would love yet AFL hates this culture. Further proof that Americans would never relate to AFL.
AFL just has a very dorky image that is hard to sell to overseas markets. Seems to even be a struggle to get the Kiwis on board for them.
Most Islanders are into sprinting hard and tackling hard which Union and League does. AFL is mostly jogging and wrestling, not really an Islanders style. Showed perfectly what I mean when Australian Islander Izzy quit AFL mid contract for less money!!

Pic courtesy of USARL
www.usarl.com