Presumably the usage of humans stays relatively constant and costs for infrastructure increase 5 to 10x.

Just means you just pay out 1/10th as much per traffic; you already had some estimator for signal to noise measuring buying likelihood. It's just gonna drop

That depends to a large extent on whether & when the bots will be endowed with spending power.

As long as humans keep using the internet I can’t see it mattering too much. Has this impacted the amount people who are using social media I wonder.

Hopefully it goes to zero

Maybe if the internet's value is absolutely destroyed we can start over. Or just bury it in the past