She said she liked him so why not?
I'm friends with 3 girls I met on POF.
Her last post stated that she thought he was a nice guy ergo doesn't want to hurt his feelings, and that he's easy to chat to. If the latter is true she would have told him face to face and offered friendship instead, however she only sees it as a transitional stage to let him down 'gently'.
Course this all based on my own experiences which maybe less than yours.