I was wondering if anyone has any experience using this online workshop? (You must critique ten stories for everyone you submit, and All-Story Extra selects two for publication).

Was the experience helpful? Were the critiques useful? Does anyone know of a person actually selling a posted story to any of the editors/agents supposedly visiting? Does posting a story to be critiqued like this mean you've given away your first publication rights? Can a story posted there then be sold/published elsewhere? (I mean in the workshop process. Obviously, if it's been selected for All-Story, that's a different issue).

Any information would be helpful.