Definitely a scam, if you look at their employees on Linkedin and the other "companies" (which are also scammers) that reference them, with a little bit of searching one can only conclude they're scammers. Now, about the interview, I did this research one day before the interview, so I already was very suspicious but went there to see what's up, the interviewer didn't open his camera, so I also didn't. He said that it would be obligatory for me to open it up, saying that it was needed because they were trying to prevent previous candidates interviewing repeatedly.