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.
[1] https://www.vice.com/en/article/y3pa9y/porn-sex-workers-expl...
Beautiful Public Data (https://www.beautifulpublicdata.com/) is one of my best finds.
Others I read via RSS include:
Wladimir Palant's blog 'Almost Secure' https://palant.info/articles/
Ctrl.blog https://www.ctrl.blog/
Troy Hunt's blog https://www.troyhunt.com/
Molly White's newsletter https://newsletter.mollywhite.net
Techdirt has a post about them: "New Dumb Attack Against Gigi Sohn Tries To Shame Her For Being On The EFF’s Board"
https://www.techdirt.com/2023/01/27/new-dumb-attack-against-...
Is support for Ukraine a controversial issue in the UK? In the US, support for Ukraine is pretty widespread.
https://www.ipsos.com/en-uk/public-continues-support-britain...
Personally I wouldn't say support for Ukraine is controversial here in the UK.