Can a startup hire me as a non-paid intern or volunteer?

Can a startup or any company out there hire me as a non-paid intern or volunteer to help them brainstorm ideas and evaluate their concepts and/or find their flaws? I’d be willing to sign NDA. It must be agreed that if my input generates $$$ value I will get a share of the pie. I’d be willing to work for free until my work generates value. About me: - 33 y/o - an idea producing machine - deep thinker - mathematician by nature (academically an engineer) - great people skills - great communications skills - big picture oriented, dislike mundane details - fluent written and spoken (university level) in English, French and Spanish - well travelled and have lived 4 cities and 3 countries - good knowledge about world cultures - good at correlating inter-disciplinary concepts (economics, psychology, mathematics, philosophy, politics, geography, ecology, technology, sociology, etc) and generating new ideas and concepts. - organic thinking, good feel for where things are headed. - academic background: Mechanical Aerospace Engineer specialized in aircraft structure analysis. (not necessarily my field of interest) - financially independent - My coding skills are those of a beginner. I have a passion for sharing ideas and challenging them. I am highly driven by appreciation of others, thus I want to generate value for your company and I want you to show me your appreciation by sharing the pie with me. Shoot me an email if you think you can use a free brain in desperate need for challenge.