Aha! that makes much more sense. Yeah having something autobot your click throughs seems like a motivation to run bots.

I was thinking about ad traffic from one of the meta/twitter/tiktok products and couldn't think what the motivation would be

It would but the fact it goes out and does it to other sites is weird. Why would someone else fraudulently click my ads? As an attack, I understand that, I've had that done to me. Just randomly seems odd. Maybe I'm just not creative enough to think of bad things to do with this. :D