It could be that our pattern recognizers are outsmarting the AI after a while. In the beginning noone noticed the difference and now anything written by AI has a bit of fake/dusted off feel to it. I'm sure the next generation will outsmart us again.
It used to be smart enough to figure out that you were writing marketing content and would tailor the answer for that. Now, it just writes a 500 word blogspam regardless of what you ask it to write.
Either way, this evolution/race is unstoppable. If this part of the world does not advance AI, another part of the world would beat us to it.