I don't understand the 10-14mln unique visitors. I thought Steemit has about 1mln users. And at least 50% of theae users are inactive. So that means about 9.5-13.5mln unique visitors come in via Google? And those just read like 1 article?
Even if you take into about that I might be counting for 3 unique users by myself, then this 10-14mln seems impossible high.
Visitors can be people that just click on a google link to read an article on Steemit. They do not have to register to read it.
They can come a few times during the month ;).