They use a ML Siamese head network that was donated to them back ~2012. Nothing has changed since then, and they don't prevent people from creating new accounts.
There were issues reported to them in 2016 about the siamese network failing to detect properly in cases where the client-side parameters being passed could be spoofed and held static, and they banned the people who reported it and deleted the posts from their github and the site.
From what I've seen, their team is petty, conceited, and vindictive people.
They make a show of valuing the community, but its just that; a show. When it comes down to actually reporting something responsibly in goodwill; they have no professionalism, and no credibility. They don't want to hear about it; and its easier to silence with the hammer of admin power than anything else.
Incidentally, there were also issues with the paperwork they filed for the charity in France too. You are required to have certain paperwork filed to provide when opening a bank account in France (so you don't comingle charity funds with personal funds). It didn't appear they filed that paperwork when I last went digging. Maybe OSINT will bring something up.
I honestly can't stand false hero worship, they've done nothing to earn respect and a lot to lose any credibility they may have had.
You seem to have some sort of grudge against Lichess, to the point that the only easily discoverable info about Liches's Siamese network is your own vague complaints about it. Perhaps you are the one who hasn't earned any respect.
Despite your claims that computers killed chess, chess is thriving more than ever, with more people making a living from chess than any time in history.