I gave it to you because I made money off your money, and was rewarding you for it.
Can you share (links to) the actual bets where you turned 0.01 BTC into (more than) 0.02 BTC at the time you were in possession of nullius' money?
Thats possible? (See how much I know about gambling websites...)
Depending on the site it can either be links to bets, a list of Bet IDs, or even a graph. I'm sure alia knows how to do this, proven
here.