Quora is a great place where people are looking to find answers. If your startup can help people solve their problems, do go ahead and post the link to your startup. However, the trick here is NOT to sound like a car salesman - trying to shove your startup down people's throats. In essence, just be genuinely helpful, then people will trust you to visit your links.
PS. Quora is StartitUp's best marketing channel. We love Quora!
