Last night I did something I’ve been meaning to do for a while – I deleted my academia.edu account. A post by Kris Olds on Twitter linking to this story in Forbes was the spur.
I have a page on this site, called ‘Free Downloads’ which shares almost all my work.
With the exception of the link to Google Books, this site, alternatives in the Forbes article and institutional repositories accomplish what academia.edu is supposed to be for – the free sharing of work – but without the commercial aspects.
Update: See also Gary Hall, ‘Should this be the last thing you read on academia.edu?’ (Thanks to @ for the link)