Ahh. OK. So there are multiple ways to get it into this thing.
A key is one of them, but if you've been previously registered and were rolled in today or whenever, your game will just activate in the Arc client. No key needed.
So, a month later... I am not a fan. It feels like MMO design that was leading edge in 2004.
There is zero innovation for the genre. The challenge is low for experienced aRPG fans. The structure of the game is a bunch of collect-a-thon quests.
The horizontal progression feels like a cop-out so that the developers have an easier time balancing their "aRPG as a service."
The game is incredibly grindy. Crafting and all other major decisions seem to be made with the eventual F2P model in mind.
They just introduced their dailies and weeklies along with what essentially amounts to a battle pass, and that is what pushed me over the edge. Whee...
I have no idea if the game has gotten better or not but right now you can donate to Extra Life to get a alpha key. I think its for the next 19 or so hours. Link here https://www.extra-life.org/index.cfm?fuseaction=donorDrive.team&teamID=47013 The extra life website has been having problems but it worked for me after a few tries.