There are ways do funding while being in the shadows. It’s absolutely conspiracy, but something I can see being of importance to spy agencies as Matrix is defacto centralized with all metadata & assets syncing back to the mothership. Signal also had their server code closed for a while, & I wouldn’t be surprised if something regarding US intelligence wasn‘t involved. I think you can trust these platforms more than most, but I’d prefer keeping an arm’s length until we are years removed & see open governance (something Matrix is slowly (finally) transitioning too, but other chat protocols have done for much longer).