The bots have evolved.
They're becoming sentient.
Lol. But it is so weird though. They much rather get super massive and die at times due to 'cheating' (aka bigbirtha) prevention. This is more efficient to them than being smaller and never killing themselves. More or less 20 robots with 2K body seems to be more successful than 90 robots with 1K body, at least for this specific robot.
Well, I reckon I know why this might be.
The cost of using all the sysvars is pretty much fixed. So, no matter who or what you are, to do 10 .up store
costs the same for you.
Say this cost is simply 1. If there was 10 bots with 10k energy/body/whatever, they for all those 10 bots to move up, it'd use up 10 of their energy, however, for 10k bots, with only 10 energy/body/whatever, it'd cost in total 10k to move up.
Thats what I bet is causing this, because fruitflies and such have mastered being small, but, as far as efficiency goes with energy (and I guess you could win F1 by just outlasting the opponent?) then, being big is better.
You can either keep it the same, and have some interesting bots jump into the leagues perhaps, or you can adjust it so the larger you are, the higher the cost to move.