diggo, you simply cant give a reward that effects the game for this, because that way your behind if your birthday is far away and no one will set it to the real day.
Your 'birthday' wont be your real birthday, (well it could be, but it's unlikely!) but the 'birthday' of your character - when you started playing on that world.
Exactly what I'm saying. Bk has said you will be prompted to enter your real DOB and I'm saying "No you won't, it'll be from when you first register to that world." Where did the message get lost in that?
i say your acount birthday and if you've played for a year your most likely high level and could use premuim. So how about like a week of full premium. this would help out the makers since once people see how much pemium helps at their level they will want to buy more.
Maybe sometimes you are lazy and put your B-Day into some password... Maybe somepeople want to know your age for some reasons... Like making advertising/spams.