Atlantica is a decent game. I played it for a while, and my brother still plays it constantly.
I have no idea what this person was gaining by making the post and them another account to post a "omg wow, it's awesome!" reply. As far as I know there is no referral bonus for Atlantica. It's just a free MMORPG with a cash-shop (like most free ones).
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Can't sleep, clown will eat me.