You can almost guess someone's age from that alone - they're more rare, but long domain names still appear that encode a city and a state, and you could just "grab" the first part when signing up.
Another poster raised the point of hosting services which is valid. But at present outside of that example and the above I really can't think of an example where you have a link to entity.com and you have any significant cause to verify the identity beyond the 2LD.