what that is is an RSS feed, not an email signup. If you want to keep up to date on EE news, just pay attention to the EE launcher when you first start the game. It has a news feed there as well, though it's usually just a few items.
if you really want email newsletters then do this:
this is pretty much the same thing, only you'll get invites to beta tests, some customer loyalty rewards (not often), and news about any aeria game that you're playing.