I mean it's obviously not a good server for any regular use, if you pay for power.
If you're not going to enjoy it from time to time for a bit of vintage X-Plane, modern Minecraft, etc, on appropriate Mac OS X versions, and for some deranged reason you decide to use it as a server, then it could be a good Tor relay, or perhaps a proxy to your internal network services if you're running a homelab. Assuming there's an undiscovered buffer overflow in tor, the NSA has x86-64 exploits ready to go. They probably have ARM exploits. PPC64? Maaaaybe.
I have heard good things about some lunatic Dutch man's Linux Mint-LXDE-based Debian overlay. He hosts it via some kind of dynamic DNS service. So, it is probably at least 1000% as trustworthy as Manjaro.