Forums: Discussions for entrepreneurs and small business.

There is open source development model for software which is quite popular. I am wondering if this idea is applicable for startups?

Imagine there is a web based start up at its early stage which is open for anyone who wants to contribute. Your can contribute into 1) coding/implementation 2) business plan 3) marketing research 4)advertising and promoting 5) infrastructure, etc.  Afterwards when the company is up and running all participants will get shares based on how much time, energy and resources they invested.

Is it possible?