I disagree.
A chain dropper is someone who goes to a site, drops their card, then clicks the ad on the Entrecard widget and drops on
that site. It's called chain dropping because you drop on a chain of sites linked together by advertising.
People who drop with no intention of reading are the "drop and run" crowd.
You can be a chain dropper and still spend time looking at a blog. And I think it's unfair to say that's why sites have a high bounce rate. If I go to a site and I don't like it, why should I stay there for longer than I want to? This is irrelevant of whether I find it through Entrecard or not.
People who drop 300 cards a day are dedicated droppers, not necessarily chain droppers.
Personally, I don't chain drop, I have only hit 300 drops once since I joined Entrecard over 3 months ago, and I read and comment on the blogs I like. Just so you know I'm not defending chain droppers for being one myself, because I'm not one.

I just don't agree with your comments.