I'm going to sound like a broken record here, but Quora users are the product, not the customer. Quora wants to make money and they can make more of it by showing everyone who is looking at what. If they can go to advertisers and say, "See, we know every single question people are interested in, so you can get better value out of your clicks! We show this information to everyone, so we have no problem letting you tailor your placements to exact criteria."

Then they can charge more. It's simple as that.

Quora was a darling. It was started from the inside. We didn't expect this one did we?

Why oh why do we keep creating content/value for random people we don't know when we could create a blog on our own website? When we could create a product that has value to us and others and benefits us in a direct and measurable way?

Creating that content is work. Answering those questions is work. It takes time. It takes energy. It takes concentration and value away from work that benefits YOU.

OMG, I'm doing it right now!