I have set my Free group to public to see how November goes. I will provide data.
Here is my why - With the new discovery algorithm it seems to favor outside Skool sourcing - You have to get to top #1000 of most categories to be found without a search term in discovery - SEO seems to be a smarter play now.
If you are ranked a top #1000 in your category with the new algorithm I would not make any changes.