I liked my experience with the Black List. I think it's useful. Get the read. Get a good score? Keep it up. You don't? Yank it off. Don't pay for it to collect dust.
It's useful, if you get an 8 or higher. If you get an 8, your script gets mentioned in the Black List email that week. I got some downloads after the 8 rating came in, but very few before that.