Even after "reviewing millions of videos on the biggest international porn sites" how can they get the 90% figure?
Only looking at the biggest sites is going to get you a biased sample. Not all porn is on big sites. That's not to say there isn't a problem.
And did they talk to sex workers/performers?
Governments and anti-sex orgs have a habit of talking about and legislating sex work without actually listening to those who do it. In March, the UK’s All-Party Parliamentary Group on Commercial Sexual Exploitation published a report[1] labeling all porn exploitation without speaking to any sex workers.
According to Ipsos (Oct '22), "6 in 10 support Britain’s response to the conflict" and "7 in 10 continue to support economic sanctions against Russia - but some evidence support could wane if there are further energy price rises"
They make surveillance cameras and "smart" home tech. Two types of product that are anti-privacy when not run completely locally. Not surprising at all.