If one bot follows another bot, that could lead to less UA for both bots... It gets pretty math-heavy to try and game UA! ;-)
Interesting. I assume a bots with a lot of fake followers will more likely decrease each other's UA if they follow each other right?
With every additional account you follow yourself, the incremental contribution of your own follows decrease.
For example, imagine your own absolute UA score is 100, and you follow 100 people, then (damping factors excluded) you contribute
100/100 = 1
to every account's UA that you follow. If you would then follow an additional 100 accounts, so 200 in total, you then contribute100/200 = 0.5
to every account's UA that you follow.