Someone please tell this to Spotify. It's a little infuriating that for the last three months or so you may not be a member of their service unless you have an active Facebook account.
You think Spotify is going to cancel their sweetheart deal with Facebook because some random blogger said Facebook-only logins are bad?
Of course, I would love to see some actual numbers on whether it was worth it for Spotify (I suspect it was), but my point is that's a bit of a special case.
