The comment section of Digg was very different from Reddit. The Digg redesign was the original reason I ended up moving to Reddit.
Their were some one word replies and grammar mistakes but it was certainly not the norm in the subs I frequented at the time.
I can't say much about other social media sites, as Reddit is the only one I have used with any regularity.
Jackett can be run on any computer. It doesn't need a server or any serious hardware. It can probably be run on a $20 Pi. It's just allows you to interact with trackers via API calls.
I use Prowlarr via Docker now a days. It's provides a much better experience to interact with othe instances of ARRs.