Posthaven came out of the ashes of Posterous, which a lot of people on HN used (including me). Right now I switched to Posthaven from Posterous because the transition was seamless. Add to the fact Garry Tan is obviously well-known in the YC community, so that gets the discussion a little more attention.
App.net started with a certain positioning, not as a similar product to the Posterous or Posthavens of the world, but as a mission in how it would treat its customers (at least that's how Dalton Caldwell framed it in the intro videos). Although app.net has changed over time, I think a lot of people on HN view it with skepticism because of the lofty goal of moving users away from Twitter or Facebook. I think people couldn't bet on the fact that a critical mass of people would move from those sites simply because they make their money off of advertising dollars.
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Posthaven came out of the ashes of Posterous, which a lot of people on HN used (including me). Right now I switched to Posthaven from Posterous because the transition was seamless. Add to the fact Garry Tan is obviously well-known in the YC community, so that gets the discussion a little more attention.
App.net started with a certain positioning, not as a similar product to the Posterous or Posthavens of the world, but as a mission in how it would treat its customers (at least that's how Dalton Caldwell framed it in the intro videos). Although app.net has changed over time, I think a lot of people on HN view it with skepticism because of the lofty goal of moving users away from Twitter or Facebook. I think people couldn't bet on the fact that a critical mass of people would move from those sites simply because they make their money off of advertising dollars.