You construed Miss Marple's comments as though she were guilty of self promotion or selfishness. Miss Marple merely stated fact: most volunteers do not have the advantage of a column in which to inform others of their intentions.
How about a list of journalists who quit their full-time job last June to become a full-time volunteer for the Bush team? I'll start it off:
1) Peggy Noonan
Feel free to add names as they come to you...