I'm not going to draw the conclusion here through the usernames. OP has already said above that DuckDice randomly generate a username for all the new registered users, which is pretty same there. Based on my 6 years gambling experience on DuckDice, I can confirm that he is right about the randomly given username. However, the last active time of 'drhouse99' and account registration time of OP can't be a coincidence here (highlighted by holydarkness above).