It was free of charge and yes a part of an experiment.
I do not know the full name of the guy, Roman something (I can drop you the link if you want, I contacted him per email following my researches online).
I provided my date and place of birth, country where I live, a lot of pictures of myself and my parents (with dates of birth too).
Also he asked me to describe myself from the personal and professional point of view, my relationship with my parents, what I like and what I do not like and the same for my parents.
I filled out 2 tests too. Temperament + management style.
He asked me a couple of questions to clarify things later on too.
The funniest thing that I thought my mother was EII, he typed her LSE. I was like
I made her do a simple test yesterday as well as read the descritions to her.
She totally identifies with LSE.