That's some very interesting information you came up with... and fascinating that 3rd parties are actively looking at and comparing Steemit.
And nice to see that the community has what might be described as a "positive slant." There's enough griping and anger elsewhere in the world!
I have a feeling the person who might best be able to answer your question about blockchain data and queries is @steemchiller, since steemworld.org pulls massive amounts of information to make the site highly informative and usable. Not suggesting he's going to do it for you, but possibly he could point you in the right direction?
A little off-topic, but related to your ongoing advertising and marketing efforts... what about just a public relations team? As in, someone(s) who is constantly sending news releases to every conceivable crypto news service, acting as liaison to exchanges, updating the "project news" sections on CoinGecko, Coinmarketcap and so forth.
Often you get more reach from people reading about something than from seeing actual advertising.
Does the Steemit team have such a person(s)?
I already received a reply from @moecki and he described to me what the difficulties are and what are the options for obtaining such information.
When it comes to the Steemit team, it's hard for me to comment because of the veil of secrecy that surrounds it. However, since I signed up to Steemit, I have never seen any press releases or just news about Steem. Therefore, I can assume that there is no public relations team.
Interesting coincidence, but I thought the same thing as you and even did a little research. If you follow the link, you will see the prices for publishing articles and press releases in some mass media. I don't even know if it will pay off.