There are 90 members with last names beginning with Y or Z (42 and 48, respectively). That membership roster has to be over 2000 names long.
Yes. Most players in Big Media, as well as politically ambitious in the military, etc. It’s a big Swamp.
Even more insiders are CFRers through companies they control, but may not have the own names on the roster.
It has 4900 members, apparently.
Even you can be one of their grunts: https://www.cfr.org/career-opportunities/open-positions