I have not investigated either of those companies closely enough to know what they gather, but in more general terms, companies do gather that information.
Typically—and keep in mind that we're told to respect authority and to give a straight answer when asked a question—people give their real information. It doesn't occur to them to give a made-up name or a made-up birthday or to use an email address that is a throwaway or that hides their real email address. They use their email address, and that gets connected in the background by the data brokers. It's a huge concern.
As for how to identify whether somebody is providing their real age or not, there are a lot of companies that are selling this service. They will collect your government photo ID and they will verify it. They amass that information, and that is another threat. On legislation, I know that Canada is thinking about the same thing that the U.K. and the EU have been thinking about—or, in the U.K.'s case, it has been enacted—and that is requiring organizations to collect that information. That is a huge threat.