OF is correct as usual; these games are not official ODIs. So someone like Afridi, who is banned for his next three ODI games, is of course eligible to play these warm-ups as they are no more than glorified net sessions.

The results and performances in these games, as far as I know, do not count towards a player's ODI or first-class statistics, as these are 13-a-side warm-up games where 11 bat and 11 field at any one time.

In all honesty, I agree with the ICC. Organising official ODIs one week before the World Cup starts, between teams who would quite possibly face each other in crucial Super Eight games, would have been rather silly, as it would have devalued the competition.