$10 is much different than $20/month.
I'm intrigued by ChatGPT as a work assistance tool. I have found it useful a number of times. But there's no way it's adding a contours $20/month of value to my day when I compare it to other things on which I spend my money. I'd rather just not have it than spend that much.
$20 one time fee? Maybe. $20/mo? Not at all.
This is no different than streaming media services. There are streaming apps where I'd like to see their content, but not the rate they charge I don't find worth the value. So I don't subscribe.