Many thanks for your precise and thorough answer - it brings me more confidence in Steem's future fate to see this network may rely on the work and support of that dedicated members like @deltik and yourself (and it makes me hope that someday the Steemit community will be able to convert it to the free software regime).

And yes, the Witness list I was refering to is the one you mentioned (made by @drakos, with an -s at the end :-)).