I read the post, and I saw this so called blacklist says you have to behave 40 posts and then send 40 steem.. sorry but this sounds really fishy to me! I would try to find out more about that blacklist account first.. I mean you're giving away prizes, not robbing people...

I personally feel downvoting without letting people know why is not fair.. sometimes people don't even know they are doing something wrong that doesn't suit the platform well.. only way to change this is by giving them notice of this, so they can see what they will do with that..

Again, the amount they ask you to send to get of the list sounds fishy, I don't believe steemcleaners works like that either..

Good luck!