OTM does some advertising for the game, but I agree more would be more effective, only advertising I have seen so far is on the appstore. Then again, the game has done very well considering the little advertisement that has been done, I still can't remember how I found this game.
Also, many of the servers are empty due to server xfering around in the past. Larger servers just get larger. Hopefully, we see some servers like Crom and Sulis pick up in recruiting, but if they don't idk how effective an ad campaign would be considering the game is a global one. Advertising to all regions of the world sounds expensive and I feel like OTM's funding could be better spent on servers and developers to deliver more content in a timely matter.
What do you expect us (sulis) to do for recruiting, we don’t necessarily have much to advertise that differs from other servers and with Nuada becoming a thing if people change servers most want to go to the newest one where they haven’t killed a necro yet. Maybe if otm set the server that people first get to sulis after downloading the game we would get some numbers. Where you at otm? ;-;
I have never seen a forum recruitment post or page for sulis by anyone in the top clan on sulis. Arawn, Rosmerta, Rhianon, Epona, Herne aggressively recruit new members through world xfers. The second someone posts, "i'm thinking of world xfering" or "what world should I play on" we all jump on it. The big servers get bigger not just because we are big, we got big because of how we recruit. I don't know anything about sulis. I don't know top clans name, what type of gear distribution it uses, does it have a feeder, can it kill gelebron... These are all things that basically everyone in the game knows about Arawn, Ros, Rhia, Epona, Herne, Morrigan... But things barely anyone knows about Sulis, Crom, Belanus, Taranis etc...
If you want people to know about your world and come to it you need to advertise for yourselves first
EDIT: I'm not saying its not your fault that your server is dying slowly, rather I meant this as a suggestion for ways to pick up recruitment.