They claim that their servers are based on Panama, Japan and Malaysia, to not keep any logs, you don’t need any personal information to register and they accept bitcoin. I know they are closed-source but so are some e-mail providers listed on PT’s recommendations and this looks much better if it’s real.
In general, all services on the internet CLAIM to do or not to do certain things. We can only validate such claims if we get control of the servers. This is almost never the case.
You could simply add a reverse proxy server to mask the real location of the whole infrastructure.
What is the benefit here in terms of privacy/security?
This website seems to have a certificate that is invalid since May 2018. This doesn’t look like trustworthy security.