I'm not surprised they went for 10k sats, but I'm more surprised that they bothered racing the RBF. That could mean the attacker has already factored this defense into their script, and it's programmed to automatically RBF anyone, up to some limit.

Why not? An AI with a mandate to take whatever is possible would do exactly this.

The fact that the attack happened so quickly, over such a small amount, and the RBF's were in place immediately, tells me that we are dealing with agentic AI here.

"Why not? One sentinel for every man, woman, and child in Zion. That sounds exactly like the thinking of a machine, to me."