500$ out of nowhere

[Defendant]

So I logged into my Fullcontact Poker account and found $500+ in my cashier account that I hadnt put there. I checked my bank, I checked my transaction history, and I checked Neteller...nothing.

What do you do here?!?

Well...

First i changed my password just in case, cause thats just freaky. Then I mulled it over for a while in my head and decided that well, if it was a system bug, I suppose I should do the right thing and tell them.

Am I a sucker?