Why Zurker may actually succeed in the social media market
People on my friends list have indicated that Zurker uses a model of ownership that renders it somewhat resistant to Evil Corporate Takeover. This is basically done by giving shares away for getting people to sign up. It's a good way to grow a user base quickly, but frankly I don't think it makes Zurker resistant to take over, any more than all those building societies that are now banks were.
What it does do, however, is create a user base of early adopters with a financial interest in making the platform succeed. I suggest that this is the factor that may prevent it becoming a similar graveyard to Diaspora or Google+.
If you want to get in on the action, you know where to go. It may just be free money. The devious bastards.