Aol as a singular silo only lasted so long. Really, there were a few back then too, AIM(and icq)/MSN/Yahoo were probably the biggest and each had a good chunk of users that refused to switch to the others, and each one fell.
I also don't think we've hit AOL 2.0 quite yet, so we still have some time to see how it all works out.
I also don't think we've hit AOL 2.0 quite yet, so we still have some time to see how it all works out.