Although their homepage doesn't really mention it much, I expect that Yoti (the partner company providing age and identity verification) does most of their business with online pornography sites including PornHub that accept user-uploaded content.

Their business is looking to expand into providing age assurance for the under-13 age group, according to their latest "Council of Guardians" public meeting notes from Dec 2021: https://www.yoti.com/wp-content/uploads/Guardian_minutes_9_D...

I don't know what to think about any of that. I suppose it's kind of predictable that a business like this will appear and provide these services given that so many people have smartphones nowadays.