https://twetch.app/t/a4a1f0df60ef660083999903cb0abc9132bb35…

Twetch · November 28, 2019

https://twetch.app/t/a4a1f0df60ef660083999903cb0abc9132bb35d703a9f99f3099f19b92d4853f

Replies

Twetch · November 30, 2019

Here's another (very) costly signal : Patents