If you aren’t aware of Quora – you should be. In their words:
Quora is a place to gain and share knowledge. It’s a platform to ask questions and connect with people who contribute unique insights and quality answers. This empowers people to learn from each other and to better understand the world.
More pragmatically it’s a great place to pose questions and get answers to questions about founding and running startup companies. Quora was founded in Silicon Valley by successful entrepreneurs and they used their personal networks to jumpstart the company. As a result it has attracted many topflight VCs, founders, angels, professional service providers, mentors, and others involved in the entrepreneurial ecosystem.
Here’s a great example of how it was helpful to me. Last summer I was mentoring with the MIT Sandbox fund and one team had an issue with their founders’ agreement. So we went looking in all the usual books and sites about startups and didn’t find anything that was really helpful. That’s when I remembered Quora. I found a number of answers, including templates for agreements and lists of what should go into a founder’s agreement. (https://www.quora.com/unanswered/What-should-go-into-a-founders-agreement).
I was able to provide this information to mentees and since then Quora has been my go-to source when I don’t find an answer to a founder’s question.
So even if your mentor has an answer to your question it might be helpful to check out answers on Quora as well to get additional perspective on your issue.
I don’t know what their business model is, but I’m glad they seem to be successful and heavily used by knowledgeable people.