I still think it's super unimpressive that you HAVE to use google to obtain one of the cards. I signed up using my hotmail account because it's still my main account and I've had it since I was in high school.
The problem is suppose I never see this thread and sign up for goko with my hotmail account as I would having not seen this thread. I can NEVER get walled village, furthermore it's the last promo I buy so I would go through the hassle of beating all the adventures to get the promos (which btw is a huge hassle) and then I find out I needed to sign up with my google account to get walled village? Thats not OK, that means that by the time I get to it I need to decide to a) make a new account and create a google account, OR I need to be ok with not being able to have walled village.
This is 100% not ok, I was willing to get behind a LOT of other issues, but this might actually drive me away from goko, I know it'll drive a lot of other players away.
If it was like when you try to buy it, it says hey mind giving us a google account for this, then I'm still unimpressed but it's unlikely to make me quit over it. (ie as a one time thing when I buy it I have to confirm I have a google email)