i speculated about this, trying to find the blog post or email i wrote. turns out i was 100% right:
https://theintercept.com/2018/03/20/the-nsa-worked-to-track-down-bitcoin-users-snowden-documents-reveal/
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!
