Not sure how they verify that for "non automated" broker. Like from the looks of it, users can import files, which I think can be faked.
I know for journalytix you actually have to provide live login details to connect your data to the journal. Which would scare people, including myself due to privacy issues. I know cause I used it before realizing it's not safe lol.
Now I use Metatrader5. and it's probably the best for this since it has separate investor login credentials (read only). Forexfactory use this method in their "trade explorer" feature. THey used to have member badges that have that set up to their FF account.
I honestly don't think this idea will take off here though. ET is very broad from markets that we discuss, unlike FF which is only forex for the most part so it was easier to implement.