1. people get tired of hosting blogs on dreamhost 2. list mirrors like nabble do wholesale migrations without redirects (Google groups is gong thru this now wi

1. people get tired of hosting blogs on dreamhost 2. list mirrors like nabble do wholesale migrations without redirects (Google groups is gong thru this now with new format (but with redirects, I hope): groups.google.com/forum/#!msg 3. wiki's get pages duped and branched to where their marginal utility is 0, so the sponsor decides to start over.