Shane gave a talk recently where he outlined his reasons for publishing on the indie web:
Most people reading this will probably have an account at most or all of these sites: Facebook, Instagram, Twitter, YouTube, Vimeo, Tumblr, Wordpress. Many also had accounts at Friendster, Tribe, MySpace, Delicious, Magnolia, Gowalla, Geocities. But no one has an account at any of those (on the second list) anymore. And all of the content that we created on those sites is gone.
All of those super emo feeling you posted to MySpace, they’re all gone. Some of the great web designers of our generation got started on Geocities. That stuff is gone forever. And sure, it was sparkling animated GIFs and neon colors. But that’s important history. Yahoo bought it, left it alone for a while, and then decided one day to turn it off.