Google is your friend people :). (More details in the link)

Group projects
When members feel that they can't discuss their group project freely enough on a discussion board, the use of a public eBay Group should be considered. However, it's important that they follow the Groups usage policy

Charitable projects
Allowed
Discussion of projects to support recognized charities. Please make sure you follow the guidelines of our charity and fundraising policy.


http://pages.ebay.com/help/policies/everyone-boards.html