Did you see he bought a huge house?
I hadn't seen that but just found this article on it when searching: https://www.dirt.com/gallery/moguls/tech/signal-moxie-marlinspike-house-los-angeles-1203414449/moxie9/
Wow, very different tastes than what I would expect from a privacy advocate.
Not a great source.
Also, I believe he was a multi millionaire well before Signal and MobileCoin. This isn't clear smoking gun.