[na85]

MSN Messenger was playing catchup to ICQ, they only became a leader by process of elimination when ICQ turned into adware and MSN was the only non-awful contender.

[WalterGR]

So it became successful because it was the best option? I don't think that deserves the dismissive "only became successful because..."

[na85]

The best deep-fried snack is still unhealthy. Being the best in a field of crap isn't much of an accolade.