Even though it is a nice idea devsaupa, this can already be accomplished by adding that game developer to your friends list. This will now be registered (for lack of a better word) in this way, but this might be divided into two separate things in the future.
I'm not saying this is actually how it's going to be, but there were plans for having two separate features on behalf of the AG users and their profiles. One would be to become friends by accepting back and forth through invitation and the other would be to follow a certain user, which is the same thing as you are suggesting here. =)