I remember there were polls about it, but I cannot find them.
This one user is convinced the users here are literally below the age of highschool. I'm 25 myself and remember seeing people above the age of my parents posting, so I wonder if there's information on the ~population across ages.
Maybe not but communists do have the secret to eternal youth. Reactionaries suspect this and are jealous.
The directions to the fountain of youth are detailed in the back of Capital volume one.