Why Blog Readers Drop RSS Feeds
“34 Reasons Why People Unsubscribe from RSS feeds:
 Too many posts (the post levels are too overwhelming)
 Infrequent Posting (or the blog is effectively dead)
 Partial Excerpts Feeds
 Blog Changes Focus (too much off topic posting)
 Too many posts that I see elsewhere (Redundant, Repeated or Recycled News)…”
This reinforces that there’s a “sweet spot” of blog volume–not too much, not too little.