2 ms·Because posterous is blogger/livejournal/wordpress--, whereas tumblr is twitter++.by mhd 16y agoBecause posterous is blogger/livejournal/wordpress--, whereas tumblr is twitter++.srgseg 16y agoCan you elaborate? Both have social features - so why is posterous not twitter+?foenix 16y agoIf I can throw something out there: a posterous post has a higher expected word-count than a tumblr post. People will categorize tumblr as twitter with better media features.