The posters are likely automated bots based on the frequency (2-3 posts per minute) and duration of time (6+ hours) the accounts post links. The links (except for the once instance of an image linking to malware on archive.org) direct hardware-gui, which according to who.is, is registered by R01, the largest russian registrar. Given russia's past actions, whoever is behind this has little to fear.
While websites are typically subject to local laws of their registrar, the '.su' domain belongs to the soviet union, and has therefore fallen through the cracks and has ended up in a grey area, since russia just turns a blind eye to whatever it hosts despite having direct ownership. It's supposedly being retired by 2030 but that just means new domains won't be allowed to be made.