Thanks
"Killer Loyce" was my most boring bot: it drowns all it can, all the time. I've had much more advanced bots, but bot efficiency depends on the other bots in the room. That means I had to switch bots many times.
I've had other bots that performed much better, but the right opponents didn't stick around long enough to reach the required number of rounds. In the end, "Killer Loyce" needed about 100 more rounds to win the contest. My score was high enough to just burn through losing those 100 rounds, and win the contest.

These are all the bots that made a profit while hunting for this contest (I won't show the bots that lost money):


I really hope more people join next time, it's a fun game!

I'll confirm here once I've received my prize.
Update: that was fast: prize received