Thanks!
"Quora may share your personally identifiable information with third parties for the purpose of providing the Service to you. If we do this, such third parties' use of your information will be bound by this Privacy Policy. We may store personal information in locations outside the direct control of Quora (for instance, on servers or databases co-located with hosting providers).
As we develop our business, we may buy or sell assets or business offerings. Customer, email, and visitor information is generally one of the transferred business assets in these types of transactions. We may also transfer or assign such information in the course of corporate divestitures, mergers, or dissolution."
In this case though, they're mainly collecting your interests, subjects you follow, answers on subjects, how others rated those answers, and your questions. Not exactly private stuff unless you're interested in crazy subjects.
They also have an anonymous option, where you can answer anonymously. I'm not sure how that will be sold, Quora still knows who you are, answered as anonymous vs not would be useful information.