Have you got some Ecard sites you hit almost daily, even if the post is old ? I have some sites I hit and drop on and was noticing that many of them looked the same so I did a second look, and noticed some of the posts were 4 to 6 months old.
These folks still drop on me, and still advertise at my site, I guess they are on an extended break.
The others I left messages on the Ecard site asking their status, and if they were still blogging.
It takes precious time to make drops, and if no one is available to appreciate the effort, seems like a waste.
Just a thought