99% of AI users on Bitcointalk will just use it to attempt plagiarism and spam, which is already prohibited in forum rules. Also, it is straightforward to detect GPT3 content, there are AI detection sites that do just that.
As of 4 days ago there is.
https://gptzero.substack.com/fight fire with fire.
This would not be a solution for bct though.
but something like it maybe I don't see forum admin investing in this forum like that,
I once knew a guy that said people using his name to monetize their own initializes generally monetized his with no input.