Limiting registered users to only X posts every Y period of time?

I want to create one subscription category that allows a user to login and view 5 posts every month. It is a free subscription, but they are limited to only 5 posts a month. Is this possible?

You will need custom code for that. And you will need to decide whether you mean five views or five posts (each with unlimited views).

Thank you for your quick response. So it sounds very doable! I would rather do 5 views, but 5 posts is possible if that is easier and more “secure” to limit users. I mean, I assume the posts could be saved in the database by views may only be saved by a cookie? Am I wrong?

I wouldn’t do it with a cookie. I would set an incremental meta value each time a post is viewed and then check against that.