Extension deals with situation where sites have many short-term contribution pages that may later be disabled. Sometimes these pages are google indexed and people go to them wanting to donate.
The extension allows a default contribution page to be configured (by domain), and blocks disabling or deleting of this page. Browsers accessing a disabled contribution page are redirected to the default page.
This extension (& any attempt to redirect in a Civi hook for disabled contribution pages ) is currently blocked by
https://issues.civicrm.org/jira/browse/CRM-15683
We are working with this extension + the patch in that issue for 4.4 at the moment - hence the extension is not (& probably will not be) enabled for automated release