The system was mandated by UK law. Mindgeek isn't the only provider that makes an age verification service, though they are the largest (since they own most of the largest pornographic brands on the web).
David Cameron was the one who pushed for the law that put all of this into effect; Pornhub isn't remotely responsible. They're just creating a verification service that they're now legally required to run to comply with the law.
The system was mandated by UK law. Mindgeek isn't the only provider that makes an age verification service, though they are the largest (since they own most of the largest pornographic brands on the web).
David Cameron was the one who pushed for the law that put all of this into effect; Pornhub isn't remotely responsible. They're just creating a verification service that they're now legally required to run to comply with the law.