It's a nice service but seriously lacking on some fronts. Especially their relationship with Bits of Freedom is great. I looked into migrating our business email to Soverin but the absence of 2FA and less importantly DKIM and IPv6 kept us from doing so.
Strange decision, as systemd-nspawn[1] specifically mentions and supports btrfs as a CoW filesystem for its containers. And as far as I understand, systemd is primarily developed by Red Hat employees. So either they'll add support for CoW alternatives, or they'll remove btrfs support from systemd-nspawn all together.
Services like these give Tor and related projects a bad name. Taking down illegal market places is part of the police's job and this is definitely a success story. The article is lacking in details a bit, but it seems they've taken it down using regular old police work as they mention an "undercover operation". This proves once more that the weakening of security for everybody is not needed to catch criminals.
The fixed version does not seem to be released yet on pypi or their launchpad PPA. The only (official) place where a fixed release is available seems to be https://releases.ansible.com/ansible/
It's a lot easier to set up and manage in my experience. The interface is very user friendly. It all depends on your specific needs of course. ELK is a bit more performant I think, although I have never compared them properly. Both have good scaling capabilities.
https://fosdem.org/2019/schedule/event/http3/