As others have mentioned this is a very interesting side gig. How did you find leads on these companies to turn this profitable though? I imagine any company that does this sort of research would have to be relatively forward thinking.
My base of operations is in Tokyo right now and there's a lot of demand for these services once people hear about it. Often people approach it for curiosity and then I work my leads to turn them into clients.
Not all companies were forward thinking but they have a common traits: empathy, more concerned on providing value to their customers, and emphasize long-term problem solving over quick fixes.