We have gaps in our data for high profile individuals. People like Jeff Bezos, Elon Musk, Sam Altman, etc. People who are this famous don't need to use LinkedIn to market themselves professionally the way "normal" people do.

These profiles are also not usually directly valuable to most PDL customers, but often their absence can lead to a lack of trust in PDL data.

Wikipedia can be a good, publicly accessible, reliable source of professional and education information for these kinds of profiles.