Cygnuses are unavailable.

then go play a private server.

Completely missed the point, not surprising coming from you though.

How have they the content in an acceptable way?

It's really simple. Maplestory is a game about upgrades, and seeing that progression and succeeding in goals. Just by giving a decent nx reward (2k for example) in every pq would encourage players to do said pq's for more than just experience. You make tiers of them, along with general items. Make meso sinks that are worthwhile, such as the totems, that whole high school event thing was engaging.

Ask yourself this, a private server, at a ridiculous accelerated rate compared to the actual game, still maintains end game player's attention for months, why can they do it, and not nexon?