

It’s not CentOS 3, it’s CentOS with Linux kernel 3.10 (a 2014 kernel). This was supported in RHEL/CentOS through 2017.
Still very dated and a bad idea, of course. And even weirder that it’s on a new machine. I’ve seen tons of stores using Win7 past it’s EOL, but on older hardware.
Why “foreign” bad actors? Reddit is a US company and has “former” CIA in high-up positions. The site is heavily astroturfed by US military and intelligence. The prevailing opinions seen on the site are extremely pro-NATO and pro-“Israel”. If foreign actors are trying to influence the site, they’re in the extreme minority.
The site is of course also heavily botted to fake engagement, similar to how twitter is, but i think a lot of the unpleasant people on there are real. The site caters to their hostile, antisocial behavior.