Mainly thinking of situations where some 9-to-5er entrepreneur has an idea but no tech skills, asks you to build an MVP for cheap + equity, and you did it. The

Mainly thinking of situations where some 9-to-5er entrepreneur has an idea but no tech skills, asks you to build an MVP for cheap + equity, and you did it. Then either the project failed (prob) or it worked and you either did or did not get something from your equity. Or, you never did the work or partially did it because you didn't trust the entrepreneur. etc. Did you learn anything? Is this sort of thing ever possible?