Earlier quoted context omitted.
Does OpenAI have an incentive to get age prediction "wrong" so that more people "verify" their ages by uploading an ID or scanning their face, allowing "OpenAI" to collect more demographic data just in time to enable ads?
YES. They all do. Everyone is dripping to get their hands on your biometric data and medical info.
Product managers hate this, they want _minimum_ clicks for onboarding and to get value, any benefit or value that could be derived from the data is miniscule compared to the detrimental effect on signups or retention when this stuff is put in place. It's also surprisingly expensive per verification and wastes a lot of development and support bandwidth. Unless you successfully outsource the risk you end up with additional audit and security requirements due to handling radioactive data. The whole thing is usually an unwanted tarpit.