The crowdfunding website for personal interests

Looking for: Developer
A crowdfunding website that collects a dollar from every registered user and then , every week or every month (or every day, if website becomes very successful)
grants all the funded money to one random user.
The potential idea for the website is if the website has a million users for example, any user has the possibility to become a millionaire within a week or so. 
The profit comes from a 10 or 15% tax collected from each dollar funded. And ads.
The idea is unique, and there are no real other similar websites to it.
Really looking forward to having a conversation through the messages, or a whatsapp/skype call with potential partners.

Additional Info

  • Time commitment: part time (10h/week)
  • Idea stage: just an idea