No... but I'd be very curious to find out.

I don't think @curie makes much from it's actual curation process. For starters it's own curie vote isn't worth that much, it's more the curation trail that brings the dollars to authors. It makes about $60-$100 a day in curation... but pays curators a finders fee that would vastly outweigh that. I think curie makes it's money as a witness.

@qurator is a different story though, they charge a subscription fee and require users to delegate to them and upvote them. Their fee is $4 steem per user which probably takes a while for the user to get back in daily $0.03 votes. They're making about $150 a day not including subscription fees. Not sure about the others.

That said... curation isn't easy. You've got to shift through a lot to find the gold.