This week I unsubscribed from a lot of websites that I had in my RSS reader.  I wasn't reading most of them anyway.  I decided to look at my trends page today to see what the drop off was, but apparently it doesn't count your items as posted after you deleted them, but it appears it keeps them as items read.  The only anomaly in this is from Wednesday this week when I read some recommended items.  Otherwise you can see the sharp decline in what I have been reading.