first of all a + for your idea to give us BNS, if they would ever close the service for it.
Otherwise I don't know why people think that they will close BNS in the near future.
Based on the quarterly reports of ncsoft, bns has been in 3rd place for at least 1 year.
before bns closes, guildwars or aion must close first because they make less money with these games.
I know that there is a report from ncsoft in which they write that they want to realign the NA/EU market,
and depending on how it goes, they may want to consider whether it is still worthwhile
but i know so many other old mmos that still exist and where people wrote 10 years ago that they will be closed soon
all in all I rather think that ncsoft will sell bns to another publisher than just close it.