How to earn money from face book?

Not that I know of. I know there are site that are trying to make money of FB cash. But no apps that you can make money from sadly.

Cloudcrowd is the only one I know. When cloudcrowd was first launched, it was very easy. But now it is becoming harder and harder to earn money from it. Not that the tasks are hard, but it is hard to get qualified for a task. If you do it well, though, the payment is great. Payment is done every day, direct to your Paypal Account, regardless of how much you have made. You can give it a try. The downside is that if you do a task wrong, then your credibility decreases and less task available for low credibility score. And there is the cut off point that your account get suspended is the credibility score goes right down.

I don't think so. I have heard about an application called Cloud soemthing something? But I didn't try it.