Hey,
it might be true that people leave to play other server like that 3.5 but lvling process is same there as here almost.
what drive people to leave for bigger server is that they want be part of community...... its way easier to find guild that suits you as a person if is there 6x bigger population.
+ I would bet that the most Ecoins are beeing spend on amulets and teas. At lvl 65 u buy max few pets and maybe a mount.
if the server had 5x rate nobody would buy those items and that would mean that people would not spend that much money here.
At the end i would say if u want the server to be more populated try to help by comming out with event ideas that would be fun and rewarding and post them do guides or pvp videos i dont think anyone would hate u for that.(no offence) What 4.6 lacks in in my opinion mainly in information availability aion databases suck ass.
For example my request what would help a lot of players gearing up and be on track is simple //dropinfo.
Kind regard,
David