If you ever update, and want to add an upgrade, the network can attack many more nodes near the end than at the beginning. The propagation logic kinda assumes the you're only in the first couple sub-networks, but when you have twenty and your lag from target to hit is several seconds, you can hit every every available target in parallel. So you could simply recognize that so many nodes are captured, then pop up an upgrade to increase the number of active targets or such.