Is this A Misdirected Coin?

[Zionatin]

Dude you are not posting enough info. Tell us more. It is strange but hey its free bitcoin. I would not worry about it. Just show your appreciation by spending the money well or investing it. Enjoy it.
But really you need to tell us more. Does this exchange have a name? When did this happen? How much was sent? What recent events or actions did you take before this happened?