Can't give precise numbers, but at least that I can notice, despite greatly filtering what I check, there's enough stuff to make running out of stuff to check rather unlikely. Besides, as I started using RSS feeds a lot recently, mainly for federated platforms (not just Lemmy ones), and the reader I use can hide posts marked as read, it's being a struggle to lower the number of posts to read in comparison to the sum of posts automatically pulled during the set up of each link.