But the lifecycle pattern of sites that provide free content posting services to the general public keeps repeating itself:
1) service opens, is exciting/different in some way, reaches new audiences
2) popularity grows, audience widens
3) business scrambles to make advertising keep up with growing costs
4) sacrifices made to platform that hurt users/devs and help corporate advertisers
5) site closes
Many see services like facebook/twitter as permanent, but I just see them as another friendster/myspace.