Lots of players play iEra. Lots of players play iClassic. Why not give them a reason to play both? Say there was a reward for playing on the server. For example if your account logged in to the iClassic server, you could redeem a prize on the iEra server. If you visited iEra, you could redeem a prize on the iClassic server. This is a great incentive for players to play both servers, and if you give them a reason to play your server, they may buy more gralat packs, etc. But so that they have to play the server for awhile, maybe they'd have to play the other server for a certain amount of hours.
Possible Prize Ideas:
iEra:
Classic Sword:
A sword1.png melee weapon
Gralat Bomb:
Exploding Gralat
iClassic:
Poison/Confusion/Fire (forgot name for it) Bombs:
Bombs that stack to 99 that are the same as their iEra counterparts
Some gun:
(that would fit classics theme though) that fires arrows
iEra Katana:
Does .5 damage like a normal sword, but has a little longer range (not much)
Anyways, post your ideas/feedback on this.
Edit: Or maybe some special hat could be the reward.