We do email the existing playerbase. But, we are very conscious to respect people's emails by not pestering them often (I think we even tell them that when one registers), and so only do it in on a rare, ad-hoc basis. Like the island sinking, new realms, and various other changes awhile back. And we have seen older players check out the game again, either prompted by that email way back when, or just curious on their own account. The other part of that though, is there are probably a lot of emails that just aren't used/checked by the owners anymore.
