I have no idea what you're talking about. Everybody in Germany used ICQ. MSN and ICQ were concurrently popular in different regions. Everybody I knew from the US or other English-speaking parts of the world used MSN. There was no mass move from ICQ to MSN that lead to ICQ's demise, they basically both died at the same time when Facebook came out to the general public.
That’s what happened in my network in canada. It was ICQ first, then MSN became popular while Hotmail was becoming popular and people moved away from icq to msn. Once the switch happened, Icq disappeared very quickly.
