Earlier quoted context omitted.
The biggest problem is the internet doesn't usually look too close
Exactly. This just accurately mirrors social media as a whole. Producing and reading fake content has become a cornerstone of humanity.
There are several scenarios for this technology to escalate.
Back in the day it was fun to auto-respond to someone's mail auto-responder. The winner was whoever had the biggest hard-drive to hold a mail queue.
It is merely a matter of time before companies realise they can replace people in PR, HR, customer service and other "public facing" roles with GPT-like technologies. At the same time the public are going to arm themselves with counter-technologies, as browser and mail client plugins. There's obviously a "market" for job application bots, auction bidding, ticket and holiday booking bots for scarce resources. But these will get sophisticated in their attempts to trick human users employed to filter and select.
Once the "battle of the bots" is underway we'll see a rapid increase in essentially deceptive, nonsense traffic swamping systems. Real human activity may become impossible to discern in that digital environment.