Hello, this is just my 2 cents since this is my job as an advertiser / video editor of some of the well known Ragnarok Server.
When creating your own server you need to consider many things that many has failed to do.
First on the list is the power of Advertising, many of my clients will start advertising their server when they are about to launch their server. I mean putting or listing your server here on RMS will never be enough. The ideal time to advertise your server is 1 month before your opening, spamming on different Ragnarok Group will help a lot but having a professionally made graphics for ads and promotional video that will get the interest of players will be a big help.
If you are planning to make whether High Rate or low rate server much better if you plan in advance. Not just on what to quest to add ingame or what items to put on the next maintenance. It's much important to interact with your players because adding different kind of automated event or exciting items will just cause the players to leave the server.