Tropik and Bobrdobr are the same person.

Proof: They use the same IP on their accounts on rollin.io. Confirmed by Admin and me (Mod Loyce) in Rollin Chatter Box. For privacy reasons I can't provide a screenshot of the IP though.

This user got paid his 5 mBTC prize.

This user did not get paid the 5 mBTC prize for cheating with a second account in the same contest.
This is a violation of the Contest Rules:

This happened right after I announced Open Season on cheaters.