This is about when people try to access Kunena articles that are restricted to certain membership plans. I don't know if CBSubs can provide a more elegant message to people when following a link to a post.
Much like how CBSubs limits access to articles after the Read More tag, it would be nice to be able to better customize the messaging. It can also provide an opportunity to include some marketing message way to entice someone to buy a membership. I guess I am thinking of the news sites that ask you for payment to get past the paywall.
I know Kunena, defaults to Joomla to output that message so I'm sure CBsubs isn't involved in this (since permissions are set in Kunena). But I am hoping it might be possible for CBSubs to take the lead on this. Perhaps a new CBSubs Plugin?
Anyway, this is just an idea to help improve the user experience.