First off, what is it? It’s this, via the About section of the site:
Stratechery provides analysis of the strategy and business side of technology and media, and the impact of technology on society. Weekly Articles are free, while three Daily Updates a week are for subscribers only.
Recommended by The New York Times as “one of the most interesting sources of analysis on any subject”, Stratechery has subscribers from over 85 different countries, including executives in both technology and industries impacted by technology, venture capitalists and investors, and thousands of other people interested in understanding how and why the Internet is changing everything.
Everything I’ve read on it has been insightful and in depth, including this piece on IBM and the acquisition of Red Hat.