This discussion is intellectually dishonest. Either some people here genuinely dont understand the concepts of kindness and gratitude, or they do understand them and are just choosing to spread falsehoods anyway.
Just because my beer pub isnt going out of business because you took some free beers doesnt make it ethical for you to exploit my kindness and use those free beers to build your own competing beer pub.
If people are still confused: that setup is not sharing knowledge. It is stealing with nicer branding to help you and your friends sleep at night.