im guessing something later is supposed to pop up. Like a chest you know? so we'd use the keys to open the chest which gets us maybe something awesome from the years we joined like a monthly collectable or uh... Maybe a new fancy item. I think these key's would have some kinda use cuz like the saying goes. "Theres a key for every lock. We just have to know which one."mrgreen
Im not going to sell them or use them unless i know the item is worth it or the money is worth it i may use one just to find out what there for but thats it btw this is how many i have send me a trade if you no belive me.
I think there has to be a reason why we are given one for every year we've been here, and I'm doubting it's just that Gaia likes older users better. Whatever they are for has to be related somehow to when we joined.