I'd imagine they got tired of dealing with Censhura's bot claiming and decided to find a server without the bots.
Engima - Aliases include "FussionofExcellence", "Enigma", "EnigmaCore", "EnigmaCoore", and probably a bunch of other repearl names.
They got tired of dealing with Censhura's $4000 bot. It's basically impossible to claim against them if they have numbers at camps.
Enigma wasn't getting any claims, they weren't getting any items, their members kept leaving, they didn't have enough to camp anymore against the raging Censhura bot system.
Not to say they were completely the victims of anything - the Enigma leaders were kind of crazy, I watched Censhura fighting Cerberus and got kicked from their LS. Segun was the linkshell holder, if I remember correctly, and Xatsh was a pearlsack. I don't know if that is still true on Fenrir, but you asked for information.
They were unable to hold down many members on this server, they could not compete against the land kings, and people liked to start drama concerning them. They moved to Fenrir to hopefully clear their name and start a little more fresh.
I hope that Enigma is having a better time on Fenny. You can't do anything concerning 21-24 hour pops on Garuda if Censhura doesn't want you to. tl;dr : Garuda's endgame kings sucks because a $4000 bot monopolizes everything, join Censhura or don't do kings.